Latha covers a certain distance from his house to office by bike. She travelled at the speed of 60 km/hr

Latha covers a certain distance from his house to office by bike. She travelled at the speed of 60 km/hr, he reached the office 10 minutes late. So, she increased the speed by 20 km/hr, she would have reached the office 5 minutes earlier. Then find the distance between her house to office?

A.            40 km

B.            30 km

C.            45 km

D.            25 km

E.            None of these

Sol:

Distance= (Difference between arrival time *

Product of speed) / Difference between the

speeds

= > (15/60) * [(60 * 80) / 20] = 60 km