Rohit swims in a 60 m long pool. He covers 120 m in one minute by swimming from one end to the other and back along the same straight path. Find the average speed and average velocity of Rohit.

Total distance covered by Rohit in 1 min is 120 m.

Displacement of Rohit in 1 min = 0 m

$\text{ Average speed }=\frac{\text{ Total distance covered }}{\text{ Total Time taken }}$

$\text{ Average speed }=\frac{120 \mathrm{m}}{1 \min }=\frac{120 \mathrm{m}}{60\sec }=2 \mathrm{m}/\mathrm{s}$

$\text{ Average velocity }=\frac{\text{ Displacement }}{\text{ Total Time taken }}=\frac{0}{60 \mathrm{s}}=0 \mathrm{m}/\mathrm{s}$