Question

A man reaches his office 30 min late, if he walks from his home at 3 km per hour
and reaches 40 min early if he walks at 4 km per hour. How far is his office from
his house?​

Answer 1

Let dist.=x

time taken at 30 kmph : dist/speed = x/3

time taken at 40 kmph : x/4

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

x/3- x/4 = 70/60

x/12= 7/6

x=14 km

Answer 2

Answer:

14 km.

Step-by-step explanation:

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.

Hope its correct