A car travels 40 km at a uniform speed of 40 km/h. What should be its speed for next 80 km if the average speed for entire journey is 60 km/h?
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Hey mate here's your answer
Given x1 = 40km S1 = 40km/h
x2 = 80km
Average speed = 60km/h
t1 = 40/40 = 1 hour
t2 = S2/80 hour
60 = 40 + 80/1 + S2/80
60 = 120/80+S2/80
60 = 120×80/80+S2
80+S2 = 120×80/60
80+S2 = 160
S2 = 160-80
S2 = 80km/h
Hope it helps you
Given x1 = 40km S1 = 40km/h
x2 = 80km
Average speed = 60km/h
t1 = 40/40 = 1 hour
t2 = S2/80 hour
60 = 40 + 80/1 + S2/80
60 = 120/80+S2/80
60 = 120×80/80+S2
80+S2 = 120×80/60
80+S2 = 160
S2 = 160-80
S2 = 80km/h
Hope it helps you
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