# A man complete s 30 km oof a journey at6 km\h and the remaking 40 km of journey in 5 h then his average speed of the whole journey is

2
by umhr1994

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by umhr1994

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2

In first case -

speed- 6km/h

distance-30km

time taken-30kmph/6h=5hrs

in second case-

Distance-40km

time-5h

we know-

s=d/t

s=40km/5h

s=8km/h

total distance travalled = 30km+40 km=70km

now

average speed = (6km/h+8km/h)/2

average speed= 7km/h

check=7km/h x (5h+5h)

= 70 km