Question

a cyclist goes around a circular track of diameter 105m in 5min. calculate his speed and velocity at the end of 7 minutes 30 seconds

Answer 1

Total distance =2*(22/7)*(105/2)=330
Time=5min=300s
Speed=330/300=11/10=1.1m/s

Answer 2

Answer:

speed= 1.1m/s and velocity =4.38m/s

Explanation:

circumference= 2* 105/2* 22/2=330m

speed in 300s= 1.1m/s

in 300s he makes 1 round, in 450s he makes= 450/300= 1.5 rounds.

distance covered in 450s= 330+ 22/7* 105/2=495 m

speed= 495/450=1.1m/s

velocity in 450s= 105/450=4.38m/s