a boy leaves his house at 9:30 a.m. for school the school is 2 kilometre away and classes start at 10 a.m if he walks at a speed of 3 km per hour for the first kilometre at what speed should we walk the second kilometre to reach just in time
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Answered by
38
=> Distance=2km
=> Total time=30 min=0.5hr
=> u(initial speed)=3km/h for 1st 1km
=> Hence time taken=distance/speed=1/3h
=> Time left =0.5-1/3=0.5/3h
=> Distance left=1km
=>Hence,speed at which he should walk the 2nd km would be
=1/0.5/3=6km/h
hope it will help you..
=> Total time=30 min=0.5hr
=> u(initial speed)=3km/h for 1st 1km
=> Hence time taken=distance/speed=1/3h
=> Time left =0.5-1/3=0.5/3h
=> Distance left=1km
=>Hence,speed at which he should walk the 2nd km would be
=1/0.5/3=6km/h
hope it will help you..
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3
Answer:
6km/hr
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