isha cycles to her school at an average speed of 12 km/hr. It takes her 20 minutes
reach the school. If she wants to reach her school in 15 minutes, what should be her average speed?
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Answer:
12 by 35 is there answer
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Answer:
The average speed in 20 minutes = 12km/hr= 12×1000/3600 =10/3
The average speed in 1 minutes = 10/3×20
The average speed in 15 minute= 10×15/3×20 =2.5m/sec
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