Question 8

Ratio of speeds of two vehicles is 7 : 8. If the second vehicle covers 400 km in 5 hours, what is the speed of the first vehicle?

Solution

2nd vehicle covers 400 km in 5 hours

∴ speed of 2nd vehicle V1 =$$\frac{distance}{time }$$= 80 km/h

let the speed of 1st vehicle is V2

ATQ

speed of 1st vehicle/speed of 2nd vehicle = $$\frac{7}{8 }$$

$$\frac{V1}{V2 }$$ = $$\frac{7}{8 }$$

V₁ = $$80\times \frac{7}{8}$$ = 70 Km/h

speed of 1st vehicle is 70 km/h

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