Question

a cyclist once goes around a circular track of diameter 10.5 metres in 5 minutes calculate his speed​

Answer 1

Answer:

Diameter is 10.5 m

Radius: 5.25 m

 Circumference will be

 =2×3.14×5.25

 = 32.97 m

 Time is 5 min

=5x60- 300 seconds

Formula:

 Speed=distance based on time =32.97/300

=0.1m/s

Answer 2

Explanation:

Diameter = 10.5 m

Radius = 5.25 m.

Circumference = 2πr

= 2 x 22÷7 x 5.25

= 44÷7 x 5.25

= 6.2 x 5.25

= 32.55 m.

Time = 5 mins. = 5 x 60 = 300 sec.

Formula:

Speed = Distance /Time.

Speed = 32.55 / 300

= 0.1 m/s.

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