Ram swims in a 90 m long pool. He covers a distance of 180 m in one minute by swimming from one end to the other and back along the same path. Find his average speed.
\(3.00\text{ ms}^{-1}\)
Average speed equals total distance travelled divided by total time taken, regardless of the path direction. It is a scalar quantity that reflects the pace of the whole journey.
Here the total distance is 180 m (from one end to the other and back) and the total time is 1 minute = 60 s. So average speed is \(\dfrac{180}{60} = 3.00\text{ m s}^{-1}\). Values like 2.25 or 2.5 would appear only if the wrong time or distance were used.
Hence, \(3.00\text{ ms}^{-1}\).
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