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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?

  1. 360 km
  2. 270 km
  3. 280 km
  4. 320 km

A
360 km
B
320 km
C
280 km
D
270 km
Solution
Verified by Toppr

The correct option is A 360 km
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 = 4010 = 4 hr.
Hence, the trains will be together after 4 × 90=360 km from Delhi.

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