A 270 metres long train running at the speed of 120 kmph crosses anot…

Question

A 270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?

Accepted Answer

Option A. 230 m. Answer & Solution Answer: Option A Solution: & Relative\, speed & = ( 120 + 80 )\, km/hr & = 200 × 518 \, m/sec & = 5009 \, m/sec & Let\, the\, length\, of\, the\, other\, train\, be\, x\, metres . & Then,\, x + 2709 = 5009 & x + 270 = 500 & x = 230