A person takes 40 minutes more than his usual time when he covers a distance of 20 km at 5 km/h. If he covers the same distance at 10 km/h, he takes x minutes less than the usual time. What is the value of x ?
1
120
2
80
3
100
4
60
A person takes 40 minutes more than his usual time when he covers a distance of 20 km at 5 km/h. If he covers the same distance at 10 km/h, he takes x minutes less than the usual time. What is the value of x ?