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 :

A. 50 km

B. 56 km

C. 70 km

D. 80 km

Answer: Option A

Solution(By Examveda Team)

Let the actual distance travelled be x km
Then,
$$\eqalign{ & \Leftrightarrow \frac{x}{{10}} = \frac{{x + 20}}{{14}} \cr & \Leftrightarrow 14x = 10x + 200 \cr & \Leftrightarrow 4x = 200 \cr & \Leftrightarrow x = 50{\text{ km}} \cr} $$