Question

Choose the correct answer from the alternatives given.
Two trains for Bhopal leave Delhi at 9 am and 8:30 am and travel at 90 km/hr and 80 km/hr respectively. How many kilometres from Delhi will the two trains be together?

A

360 km

B

320 km

C

270 km

D

280 km

Medium

Solution

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Correct option is A)

Distance travelled by the train at 80 km/hr in 30 min. = 40 km. This distance of 40 km is to be covered with a relative speed of
(90 - 80) = 10 km/hr.
Time taken to cover this distance = = 4 hr.
Hence, the trains will be together after 4 90=360 km from Delhi.

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