Question

ratio between speeds of 2 trains is 5:3. if the first train runs 350 km in 2 hours then what is the speed of the second train?

Answer 1

v1=speed of train 1
v2=speed of train 2
v1/v2=5/3
in 2 hr it covers 350 km
so in one hr it covers 175km
I.e. speed of first train is 175 kmph
175kmph/v2=5/3
v2=105

Answer 2

ratio of speed of two trains A and B is 5 : 3
Let proportionality constant is x
speed of train A = 5x
speed of train B = 3x

A/C to question,
the train A runs 350 km in 2hours.
e.g., speed of train A = distance/time
= 350/2 = 175 km/h

but from equation (1), speed of train A=5x
175 = 5x => x = 35

so, speed of train B = 3x = 3 × 35 = 105 km/h

hence, speed of train B = 105 km/h