Rohit walks to his school which is at a distance of 3 km from his home, in 30 minutes. On reaching he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 20 minutes. Calculate his average speed.
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rohit takes 10 minutes to walk 1 km .
while coming back he takes about 6.66 minutes per km .
the average is 8.3 minutes per km.
10+6.66÷2 = 8.3
while coming back he takes about 6.66 minutes per km .
the average is 8.3 minutes per km.
10+6.66÷2 = 8.3
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