A and B take part in 100 m race. A runs at 5 kmph. A gives B a start of 8 m and still beats him by 8 seconds. The speed of B is:5.15 kmph4.14 kmph4.25 kmph4.4 kmphNone

To solve this problem, we first need to convert the speed of A from km/h to m/s because the distance is given in meters and the time in seconds. We know that 1 km = 1000 m and 1 hour = 3600 seconds.

So, the speed of A = 5 kmph = 5 * 1000 / 3600 = 1.39 m/s.

Now, the time taken by A to cover the 100 m distance = Distance / Speed = 100 / 1.39 = 71.94 seconds.

Since A beats B by 8 seconds, the time taken by B to cover the 92 m distance (because B was given a start of 8 m) = 71.94 + 8 = 79.94 seconds.

So, the speed of B = Distance / Time = 92 / 79.94 = 1.15 m/s.

To convert this speed back to km/h, we use the conversion 1 m/s = 3.6 km/h.

So, the speed of B = 1.15 * 3.6 = 4.14 kmph.

Therefore, the speed of B is 4.14 kmph.

First, we need to convert the speed of A from km/hr to m/sec because the distance is given in meters and the time in seconds. We know that 1 km = 1000 m and 1 hour = 3600 seconds. So, 5 km/hr = 5 * (1000/3600) = 1.39 m/sec.

Now, the time taken by A to cover the 100 m distance is distance/speed = 100/1.39 = 71.94 seconds.

Since A beats B by 8 seconds, the time taken by B to run 100 m is 71.94 + 8 = 79.94 seconds.

But B was given a start of 8 m, so the actual distance covered by B is 100 - 8 = 92 m.

Therefore, the speed of B is distance/time = 92/79.94 = 1.15 m/sec.

To convert this speed back to km/hr, we use the conversion 1 m/sec = 3.6 km/hr. So, the speed of B is 1.15 * 3.6 = 4.14 km/hr.

So, the correct answer is 4.14 kmph.

To solve this problem, we first need to convert the speed of A from km/h to m/s because the distance and the start given to B are in meters.

1 km = 1000 m 1 hour = 3600 seconds

So, 5 km/h = 5 * (1000/3600) = 1.39 m/s

Now, the time taken by A to cover the 100 m distance is Distance/Speed = 100/1.39 = 71.94 seconds.

Since A beats B by 8 seconds, the time taken by B to run 100 m is 71.94 + 8 = 79.94 seconds.

But B was given a start of 8 m, so the actual distance covered by B is 100 - 8 = 92 m.

Therefore, the speed of B = Distance/Time = 92/79.94 = 1.15 m/s.

To convert this back to km/h, we use the conversion factor 3600/1000, so the speed of B = 1.15 * (3600/1000) = 4.14 km/h.

So, the correct answer is 4.14 kmph.