Disha cycles to her school at an average speed of 12 km/hr. It takes her 20 minutes
to reach the school. If she wants to reach her school in 15 minutes, what should be
her average speed?
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20 minutes = 20/60 hours = 1/3 hours.
Distance = speed * time
Distance between school and home is = 12 * (1/ 3) = 4 km
15 minutes = 15/60 = 1/4 = 0.25 hours
Speed = 4 / 0.25 = 16 km/hr
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