A man rode out a certain distance by car at the speed of 45 kmh- 1 and walked back at the rate of 5 kmh1 . The whole journey took 10 hours. What distance did he ride ?
A). 35 km
B). 40 km
C). 45 km
D). 50 km
45 km
Let the distance be x km
Therefore, x/45 + x/5 = 10
x + 9x/45 = 10
Therefore, x = 45 km.
8. An athlete runs 200 meters race in 24 seconds. His speed (in km/hr) is