In a 100 m race A covers the distance in 36 seconds and B in 45 seconds in this A beats B by? 20 m , 24 m , 28 m , 30 m
- 20 m
- 24 m
- 28 m
- 30 m
Explanation
To solve this, we need to find how much distance B covers in the time it takes A to finish the race.
- A's time: 36 seconds to cover 100 meters
- B's time: 45 seconds to cover 100 meters
First, we calculate B's speed:
- B's speed = Distance / Time = 100 m / 45 sec = 2.22 m/sec
Now, in 36 seconds (the time A takes to finish the race), B will cover:
- Distance covered by B = B's speed × A's time = 2.22 m/sec × 36 sec = 80 m
Since A finishes the race in 36 seconds, but B only covers 80 meters, A beats B by 100 - 80 = 20 meters.
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