"A train 800 metres long is running at a speed of 78 km/hr. if it crosses a tunnel in 1 minute, then
Channel: Doubtnut
Date: 2020-04-05

"A train 800 metres long is running at a speed of 78 km/hr. if it crosses a tunnel in 1 minute, then the length of the tunnel (in metres) is:`130`b. `360`c. `500`d. 540"