Shalini cycles to her school at an average speed of 12 km/hour. It takes her 20 minutes to reach the school. If she wants to reach her school in 15 minutes ,what should be her speed?
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Answer:
Speed= 12 km/hr
Time= 20 minutes
= 1/3 hours
Distance= Speed x Time
=12 x 1/3
= 4km
Speed if she wants to reach the school in 15 minutes,
Time = 15 minutes
= 1/4 hours
Distance= 4km
Speed= Distance/ Time
= 4 x 1/4
= 4 x 4
= 16 km/hr
( Hope this helps)
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