a car can travel the distance between the home and the office , which are 1.2km apart , in 1.8 minutes. How much faster must it travel to do the distance im 1.5 minutes?
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Answered by
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Answer:
@48 kmph, i.e. 8 kmph faster.
Step-by-step explanation:
We know that Speed = Distance/time
Distance = 1.2 km.
Time = 1.8 minutes = 1.8/60 hr.
Current Speed = 1.2/1.8/60 = 1.2 * 60/1.8 = 40 kmph.
In order to cover the distance in 1.5 minutes i.e 1.5/60 hr,
New speed = 1.2 / 1.5/60 = 1.2 * 60 /1.5 = 48 kmph.
The Car needs to travel 8 kmph faster.
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