If a person walks at 14 km/hr. instead of 10 km/hr., he would have walked 20 km more. The actual distance travelled by him is:
50 km
56 km
70 km
80 km
Explanation:
Let the actual distance travelled be x km.
Then, x/10 = (x + 20)/14.
=> 14x = 10x + 200.
=> 4x = 200
=> x = 50 km.