Question

journey at 90 km/h, find its speed lor the
(ii) A bus covers 630 km in 9 h. If it completes the first two thirds of the journey at
60 km/h, calculate its speed for the rest of the journey.
in travelling at 60 km/h completes a journey in 8 h. How much faster would it have to
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Answer 1

Answer:

Explanation:

Total distance covered by the bus in 9 h = 630 km\

Two third of the journey= 630 x 2/3 km= 420km

Therefore, the distance for the rest of the journey= 630-420 = 210km

Time taken by the bus to cover 420km at 60km/h is distance/speed =420/60 = 7h

Time left to cover the remaining 210 km= 9h -7h= 2h

Therefore, the speed of the bus to cover 210km in 2h is distance/time = 210/2= 105km/h

Hence, the speed of the bus for the rest of the journey is 150 km/h.