Question

a boy completes one round of a circular track of radius 20m in 50 seconds the displacement and end of 4 minute and 10 second will be

Answer 1

Given - Time and distance

Find - Displacement at given time

Solution - As per the known fact, 1 minute = 60 seconds

Total time in seconds = 4*60 + 10

Total time = 240 + 10

Performing addition

Total time = 250 seconds

Number of rounds in 50 seconds = 1

Number of rounds in 250 seconds = $\frac{1 \times 250}{50 }$

Performing division

Number of rounds in 250 seconds = 5

Since 5 complete rounds will be completed in given time, the displacement is 0 (zero).