Question

A man takes 1 hour to reach his office which is 10 km from his home. I f he wish to reach his office in 40 min, he must walk with a speed of? ​

Answer 1

Answer:

To find the distance,

Let distance = x km.

Time taken at 3 kmph : dist/speed = x/3 = 30 min late.

time taken at 4 kmph : x/4 = 40 min earlier

difference between time taken : 40-(-30) = 70 mins = 70/60 hours.

x/3- x/4 = 70/60

x/12 = 7/6

x = 14 km.

Explanation:

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Answer 2

Answer:

approx 14 kilometre per hour