Question

Two trains are moving in the same direction
with speeds of 15 km/h and 21 km/h,
respectively. What is the speed of trains in
respect of each other?
(a) 26 km/h
(b) 15 km/h
(c) 6 km/h
(d) 24 km/h
(e) None of these​

Answer 1

Answer:

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Answer 2

Answer:

Two trains are moving in the same direction with speeds of 15 km/h and 21 km/h, respectively. What is the speed of trains in respect of each other?

so the answer is 6 km / h

hope this help full