A bus takes $48$ minutes to cover a certain distance when travelling at a speed of $50 k m / h$ . How much times will it take to cover the same distance when travelling at speed of $30 k m / h$ ?

Question

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Answer 1

Given, Speed $= 50$ km/hr $= 50 / 60 = 5 / 6$ km/min
Time taken by bus to cover distance $= 48$ min
Distance $= s p e e d \times t i m e = 48 \times \frac{5}{6} = 40$ km

$∴$ Time it will take to cover $40$ km at $30$ km/h
= distance / speed $= 40 / 30$ = $\frac{4}{3} h r s = 4 \times 20$ min
= $80$ minutes.

Answer 2

Given, Speed

= 50

km/hr

= 50 / 60 = 5 / 6

km/min

Time taken by bus to cover distance

= 48

min

Distance

= s p e e d \times t i m e = 48 \times \frac{5}{6} = 40

km

∴

Time it will take to cover

40

km at

30

km/h

= distance / speed

= 40 / 30

=

\frac{4}{3} h r s = 4 \times 20

min

=

80

minutes.