Question

23. In a race of 100 metres A runs at a speed of 10 m/second and 'B' runs at: a speed of 16 m/second. By what time will 'A' beat 'B'? 47 Mil -​

Answer 1

Step-by-step explanation:

 A is running at the speed of 10 m/sec, he will take 10 seconds to complete the 100 metre race. And B takes 10 + 1.25 = 11.25 seconds to cover 90 metres. Therefore, the speed at which B is running = = 8 m/sec. Running at 8 m/sec, B will take = 12.5 seconds to complete the 100 metre ra

Answer 2

Answer: 3.75 seconds

Step-by-step explanation:

Given :-

The race is of 100 meters.

Speed of A = 10 m/s

Speed of B = 16 m/s

We know that,

Time = Distance / Speed

Time taken for A = 100/10 = 10 seconds

Time taken for B = 100/16 = 6.25 seconds

∴ 10 seconds - 6.25 seconds = 3.75 seconds

Hence, B will beat A by 3.75 seconds.

Note :- In the question, its asking for the time by which A will beat B by, but logically that isn't possible since they are covering the same distance but B's speed is greater than A's speed, so it is bound to take less time.

Hence, A cannot beat B.