-
In a 20 m race, A runs at a speed of 2 m/s. If A gives B a start of 10 m and still beats him by 5 s, what will be the speed of B?
-
- 117/21 m/s
- 317/21 m/s
- 21 m/s
- 2 m/s
Correct Option: A
Time taken by A to cover 200 m = 200/2 = 100 s
∴ B covers (200 - 10) = 190 m in (100 + 5) = 105 s
∴ B' s speed = 190/105 = 38/21 = 117/21 m/s
