"The ratio between the speeds of two trains is 7:8. If the second train runs 400 kms in 4 hours,
Channel: Doubtnut
Date: 05/04/2020

"The ratio between the speeds of two trains is 7:8. If the second train runs 400 kms in 4 hours, then the speed of eth first train is`70\ k m//h r`b. `75\ k m//h r`c. `84\ k m//h r`d. `87. 5\ k m//h r`"