A man reaches his office 20 min late, if he walks from his home at 3 km per hour and reaches 30 min early if he walks 4 km per hour. How far is his office from his house ?
A. 14 km
B. 20 km
C. 10 km
D. 16 km
Answer:C
A man reaches his office 20 min late, if he walks from his home at 3 km per hour and reaches 30 min early if he walks 4 km per hour. How far is his office from his house ?
A. 14 km B. 20 km C. 10 km D. 16 km