shri travels a distance of 12 kilometre from her house to school by bus at 20km/h return home at 16km/h find out time
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total distance Cover = 12+12 =24
now time spent in going to school by bus
=12/20 hrs because speed equal distance divided by time
so time will be equal to distance divided by speed. .
now
time spent in return home = 12/16 hrs
total time taken = 12/20+12/16
48+60/80
108/80 hrs
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