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Q.

A car moves for half of its time at 80 km/h and for rest half of time at 40 km/h. Total distance covered is 60 km. What is the average speed of the car?

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a

180 km / h

b

80 km / h

c

60 km / h

d

120 km / h

answer is A.

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Detailed Solution

Time Average Speed = v1+v22=80+402=60km/hr

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