Question
Time is taken by two trains running in opposite
directions to cross a man standing on the platform in 27 seconds and 17 seconds respectively. It took 21 seconds for the trains to cross each other. What is the ratio of their speeds?Solution
Let the speed one train be x m/s and the speed of the second train be y m/s. Length of the first train = Speed × Time = 27x Length of second train = Speed × Time = 17y So, {(27x + 17y)/(x+y)} = 21 ⇒  27x + 17y = 21x + 21y ⇒ 6x = 4y Therefore, x:y = 2:3
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
B _ M _ V B Q M _ V _ _ _ F V
Select the option in which the numbers are related in the same way as are the number of the following set.
(83, 24, 72)
Select the option that is related to third letter cluster in the same way second letter cluster is related to first letter cluster.
SOLDIER: WVRO...
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In each of the following questions, select the related word from the given alternatives:
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Reason (R): The Indi...
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Illuminate : Brighten :: ...