the ratio between the speeds of two trains is 7 is to 8 if the second train runs
400 km in 5 hours the speed of the first train is
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91.4
Step-by-step explanation:
let Speed of both the train be S1 and S2. Now if distance is constant then S1:S2 = T2:T1 (inverse proportional). As per question S1:S2 = 7:8 and T2 = 400/5 = 80
Putting in the formula:
7:8 = 80:T1
T1 = 80*8/7 = 91.4
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