Question

A and B are 20 km apart. A can walk at an average speed of 4 km/ hour and B at 6 km/hr. If they Start Walking towards each other at 7 a.m., when will they meet 

1. 8.00 a.m.
2. 8.30 a.m
3. 9.00 a.m.
4. 10.00 am

Answer 1

Correct Answer - Option 3 : 9.00 a.m.

Given

A and B are 20 km apart. A can walk at an average speed of 4 km/ hour and B at 6 km/hr. If they Start Walking towards each other at 7 a.m.

Concept used

Time and Distance

Calculation

Distance = 20 km

Relative speed = 4 + 6 = 10 km/hr

Time = Distance / speed

Time = 20/10 

Time = 2 hours

7 : 00 am + 2 hours = 9 : 00 am