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Q.
Two trains start from same place at same time at right angles to each other. Their speeds are 36km/hr and 48km/hr respectively. After 30 seconds the distance between them will be ?
A.
900 mts
B.
300 mts
C.
250 mts
D.
500 mts
View Answer
Correct choice: D
Explanation:
Using pythagarous theorem, distance travelled by first train = 36x5/18x30 = 300m distance travelled by second train = 48x5/18x30 = 400m so distance between them =√( 90000 + 160000) = √250000 = 500mts.
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