Question

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Mary cycles at 6 km per hour. how long will she take to reach her Aunt's house which is 12 km away? If she cycles at a speed of 4 km/hr, how long would she take ? ​

Answer 1

Answer:

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Answer 2

Speed of the cycle = 6 km / hr Distance travelled to reach her Aunt’s house = 12 km

∴ Time requried = (Distance travelled)/Speed = 2 hours

Let the time , required when the speed of the cycle is 4 k,/hr be x hours.

The speed of the cycle and the time required to the travel the same distance are in inverse proportion. ∴ 4 × x = 6 × 2 ∴ x = (6 x 2)/4 = 3 hours

∴ Mary will require 2 hours if she is cycling at 6 km/hr and 3 hours if she is cycling at 4 km/hr to reach her aunts house !!

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