Gate Exam Category

A car takes 2 hours more to cover a distance of 480 km when its speed is reduced by 8 kmph. Find its usual speed
a)48 kmph b)55 kmph c)60 kmph d)64 kmph

Read Solution (Total 1)

let the usual speed is x km/h
so,
{ 480/(x-8) + 480/x } = 2
which implies
x^2-8x-1920 = 0
so x is 48 km/h
so option a) is correct
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