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 Choose the correct option.
A) 50 km
B) 56 km
C) 70 km
D) 80 km
E) 90 km

Rationale: let the actual distance travelled be x km . then x / 10 = ( x + 20 ) / 14 - - > 14 x = 10 x + 200 - - > 4 x = 200 - - > x = 50 km . answer : a .
Answer: A