Question

9 hrs after a goods train passed a station, another train travelling at a speed of 72 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 3 hours. What is the speed of the goods train?

A) 21.6 km/hr B) 27 km/hr C) 18 km/hr D) 14.4 km/hr

Answer 1

18. GQ

Step-by-step explanation:

let speed of goods train = x km/hr

distance travelled in 9hr = 9x

relative speed =( 72 - x )

(72 - x)× 3 = 9x => x = 18 km/hr

option(C) is correct