a car travels at an average speed of 60 km per hour if it travels at a speed of 12 kilometre per hour in distance 80 kilometer find the time it will cover in 40.5 km per hour
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Distance travelled d = speed s x time t
1st part of journey: d = st = 80 x (1/4) = 20 km
2nd part of journey: d = st = 40 x (1/4) = 10 km
Average Speed = Total distance d/Total time taken t = 30/((1/4)+(1/4)) = 30/(1/2) = 60 km/h.
1st part of journey: d = st = 80 x (1/4) = 20 km
2nd part of journey: d = st = 40 x (1/4) = 10 km
Average Speed = Total distance d/Total time taken t = 30/((1/4)+(1/4)) = 30/(1/2) = 60 km/h.
rishabh693:
wrong you have to find time
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