Question

Two boys are standing on the opposite ends of a 760 metres long bridge. If they walk towards each other at the speed of 11 metres/minute and 8 metres/minute respectively, then in how much time will they meet each other?
1. 30 minutes
2. 20 minutes
3. 50 minutes
4. 40 minutes

Answer 1

Correct Answer - Option 4 : 40 minutes

Given:

Length of the bridge = 760 m

Speeds of the two boys = 11 metres/minute and 8 metres/minute

Formula used:

Distance = Speed/Time

Relative speed is the sum of the speeds when both persons are moving in opposite direction

Calculation:

According to the question,

Relative speed = 11 + 8 = 19 metres/minute

∴ Time taken to meet each other = 760/19 = 40 minutes.