supriya

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How many would like to watch Perman?

Perman is a Japanese manga series that is loved by all kids. And 90's kids were Die-hard fan of Perman.

July 2, 2020 2
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132 species

June 20, 2020 2
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What is Pisauridae spider?

Also called as Nursery web spiders.

June 20, 2020 5
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What is El Nino?

El Niño is an abnormal weather pattern caused by the warming of the Pacific Ocean near the equator, off the coast of South America.

June 20, 2020 5
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June 20, 2020 10
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What was the goal of IYFF?

Maybe the goal was to raise the profile of family farming and smallholder farming.

June 20, 2020 5
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When is international yoga day ?

21st June

June 20, 2020 5
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Two goods train each 500 m long, are running in opposite directions on parallel tracks. Their speeds are 45 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one.

Relative speed = = (45 + 30) km/hr = ( 75 * 5/18)  m/sec = ( 125/6) m/sec. We have to find the time taken by the slower train to pass the DRIVER of the faster train and not the complete train. So,...

June 19, 2020 2
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Two trains are running in opposite directions with the same speed. If the length of each train is 120 metres and they cross each other in 12 seconds, then the speed of each train (in km/hr) is:

Let the speed of each train be x m/sec. Then, the relative speed of the two trains = 2x m/sec. So, 2x = [(120 + 120)/12] => 2x = 20 => x = 10. Therefore, Speed of each train = 10 m/sec = ( 10...

June 19, 2020 2
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Two trains of equal lengths take 10 seconds and 15 seconds respectively to cross a telegraph post. If the length of each train be 120 metres, in what time (in seconds) will they cross each other travelling in opposite direction?

Speed of the first train = ( 120/10) m/sec = 12 m/sec. Speed of the second train = ( 120/5) m/sec = 8 m/sec. Relative speed = (12 + 8) = 20 m/sec. Therefore, Required time = [ (120 + 120)/20 ] sec =...

June 19, 2020 2
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A train 108 m long moving at a speed of 50 km/hr crosses a train 112 m long coming from opposite direction in 6 seconds. The speed of the second train is:

Let the speed of the second train be x km/hr. Relative speed = (x + 50) km/hr = [ (x + 50) * 5/18 ] m/sec = [ (250 + 5x)/18 ] m/sec. Distance covered = (108 + 112) = 220 m. Therefore, 220/[( 250 +...

June 19, 2020 2
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Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train?

Relative speed = (40 - 20) km/hr = ( 20 * 5/18)  m/sec = ( 50/9)  m/sec. Therefore, Length of faster train = ( 50/9 * 5) m = (2509) m = 27 (7/9) m

June 19, 2020 2
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A train overtakes two persons who are walking in the same direction in which the train is going, at the rate of 2 kmph and 4 kmph and passes them completely in 9 and 10 seconds respectively. The length of the train is:

2 kmph = ( 2 * 5/18) m/sec = (5/9) m/sec. 4 kmph = ( 4 * 5/18)  m/sec = (1/9) m/sec. Let the length of the train be x meters and its speed by y m/sec. Then, [( x/ (y-5/)]= 9 and, [( x/(y-10/9) = 10....

June 19, 2020 2
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A train overtakes two persons walking along a railway track. The first one walks at 4.5 km/hr. The other one walks at 5.4 km/hr. The train needs 8.4 and 8.5 seconds respectively to overtake them. What is the speed of the train if both the persons are walking in the same direction as the train?

4.5 km/hr = ( 4.5 * 5/18)  m/sec = (5/4) m/sec = 1.25 m/sec, 5.4 km/hr = ( 5.4 * 5/18)  m/sec = (3/2) m/sec = 1.5 m/sec. Let the speed of the train be x m/sec. Then, (x - 1.25) x 8.4 = (x - 1.5) x...

June 19, 2020 2
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A train travelling at 48 kmph completely crosses another train having half its length and travelling in opposite direction at 42 kmph, in 12 seconds. It also passes a railway platform in 45 seconds. The length of the platform is

Let the length of the first train be x meters, Then, the length of the second train is ( x/2) meters, Relative speed = (48 + 42) kmph = ( 90 * 5/18)  m/sec = 25 m/se, Therefore, [x + (x/2)]/25 = 12...

June 19, 2020 2
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Two stations A and B are 110 km apart on a straight line. One train starts from A at 7 a.m. and travels towards B at 20 kmph. Another train starts from B at 8 a.m. and travels towards A at a speed of 25 kmph. At what time will they meet?

Suppose they meet x hours after 7 a.m. Distance covered by A in x hours = 20x km. Distance covered by B in (x - 1) hours = 25(x - 1) km. Therefore, 20x + 25(x - 1) = 110 => 45x = 135 => x =...

June 19, 2020 2
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Two trains, One from Howrah to Patna and the other from Patna to Howrah, start simultaneously. After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio of their speeds is:

Let us name the trains as A and B. Then, (A's speed) : (B's speed) = √b : √a = √16 : √9 = 4 : 3

June 19, 2020 2
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Wow that's Great

June 19, 2020 2
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June 19, 2020 2
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Is it important to set up a medical ID?

Medical ID is important because, in the case of an emergency, doctors will glance at your phone and identify what illnesses or medical problems you might have and identify how to call without accessing...

June 19, 2020 5
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