A train 540 meters long is running with a speed of 54 kmph. The time taken by it to cross a tunnel 180 meters long is?
Answer: C
D = 540 + 180 = 720
S = 54 * 5/18 = 15 mps
T = 720/15 = 48 sec
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A train 100 meters long completely crosses a 300 meters long bridge in 45 seconds. What is the speed of the train is?
Answer: A
S = (100 + 300)/45 = 400/45 * 18/5 = 32
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The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:
Answer: D
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Pavan travelled for 11 hours. He covered the first half of the distance at 30 kmph and remaining half of the distance at 25 kmph. Find the distance travelled by Pavan.
Answer: D
Let the distance travelled be x km.
Total time = (x/2)/30 + (x/2)/25 = 11 => x/60 + x/50 = 11 => (5x + 6x)/300 = 11 => x = 300 km
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Walking 7/6 of his usual rate, a boy reaches his school 4 min early. Find his usual time to reach the school?
Answer: D
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A car is running at a speed of 90 kmph. What distance will it cover in 15 second?
Answer: C
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One train is traveling 45 kmph and other is at 10 meters a second. Ratio of the speed of the two trains is?
Answer: A
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A train leaves Delhi at 9 a.m. at a speed of 30 kmph. Another train leaves at 2 p.m. at a speed of 40 kmph on the same day and in the same direction. How far from Delhi, will the two trains meet?
Answer: C
D = 30 * 5 = 150
RS = 40 – 30 = 10
T = 150/10 = 15
D = 40 * 15 = 600 km
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A boy increases his speed to 9/5 times of his original speed. By this he reaches his school 30 minutes before the usual time. How much time does he takes usually?
Answer: D
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Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?
Answer: B
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