Question

A person reaches at a certain place from his home 20 minutes late, when he goes with 4/5th of his normal speed. Find his actual time to reach the destination.
1. 1 hour
2. 1 hr. 20 min
3. 1 hr. 15 min
4. 1 hr 40 min.

Answer 1

Correct Answer - Option 2 : 1 hr. 20 min

The person walks with 4/5 of his normal speed, so he will take 5/4 of his normal time

⇒ Extra time = ((5/4) – 1) × normal time = 20 minutes

⇒ (1/4) × normal time = 20

∴ Normal time = 100 minutes

Actual time = 1 hr. 20 min