Question

The ratio between the speeds of two trains is 7:8 .if the second train runs 400kms .in 5 hours ,the speed of the first train is what

Answer 1

Hii..
Here is your answer..

Solution:-
Let the speed be 7x and 8x
So,
$= > speed= \frac{distance}{time} \\ = > 8x = \frac{400}{100} \\ = > 8x = 100 \\ = > x = 12.5km \:$
Speed of first train=
$= > 7x \\ = > 7 \times 12.5 \\ = > 87.5 \: m \: per \: sec$
Hope it helps uh...✌️✌️✌️