A girl walks 12 km/h at the speed of 3 km/ h. What change should she make in her speed to take (1) an hour less and(2) an hour more to cover the distance ?
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1 )24 km per hr 2)6 km per hr
aman4867:
please explain
in 1 case we have to find that how car can cover the distance 1 hr lesser it means if we travell at speed of 12 km for 2 hours we will reach 24 for km therefor x =12 ito two = l 24
it is not 1wr it is 24
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3
Answer:
(I) 1km/h(ii) 0.6km/h
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