With a uniform speed a car covers the 8 hours. Had the speed been increased by 4 km/hr, 1 the same distance could have been covered in `7 1/2` hours. What is the distance covered? `420\ k m` b. `480\ k m` c. `640\ k m` d. Cannot be determined e. none of these

Options

A. 640km
B. 480km
C. 420km
D. Cannot be determined

Answer

B