A train passes a telegraph post and a bridge 264 m long in 8 sec. and 20 sec. respectively . What is the speed of the train?
Q1. A train passes a telegraph post and a bridge 264 m long in 8 sec. and 20 sec. respectively . What is the speed of the train?
Answer: 79.2km/h
Explanation: Let train length = L; from L/8 = (L+264)/20, solving gives L = 176 m, speed = 176/8 = 22 m/s = 79.2 km/h.