A boy is driving car at the speed of 42 km/hr. He stops for 8 minutes at end of every 11 km. What will be the time (in minutes) taken by him to cover a distance of 84 km?

Using the time formula, time equals distance divided by speed, the driving time to cover 84 kilometers at 42 kilometers per hour is 2 hours, which is 120 minutes. The boy stops for 8 minutes at the end of every 11 kilometers, so over a distance of 84 kilometers he makes 84 divided by 11, or 7 full stops. Since he stops before the final destination, the total waiting time is 7 times 8 minutes, which equals 56 minutes. Adding the driving time of 120 minutes to the waiting time of 56 minutes gives a total time of 176 minutes.

• Thanks
• Wrong explanation