A train moves past a telegraph post and a bridge 264 m long in 8 seco…

Question

A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?

Accepted Answer

Option D. 79.2 km/hr. Answer & Solution Answer: Option D Solution: & Let\, the\, length\, of\, the\, train\, be\,x\, metres & \, and\, its\, speed\, by\,y\, m/sec & Then,\,x/y = 8\,\,\,\,\,\, \,\,\,\,\,x = 8y & Now,\, x + 26420 = y & 8y + 264 = 20y & y = 22 & Speed = 22\, m/sec & \,\,\,\,\,\,\,\,\,\,…