Question

A bus covers 630km in 9 hour .If it completes the first two third of the journey atv60km/h.calculate its speed for the rest of the journey.

Answer 1

D = 630km , t = 9h
v = d/t
= 630/9
= 70km/h
2/3x = 630
x = 630/0.67
= 940.3 = Whole Journey Distance

2/3x = 9
0.5x = 9
x = 9/0.5 = 18h = Whole Journey Time

V = d/t
= 940.3/18
= 52.2 KM/H