Question

A cyclist goes once a round a circular track of diameter 1 metres in 50minutes calculate it's speed.

Answer 1

Radius=diameter/2=0.5 m

Total distance=2×pi×radius
=>x=2×22/7×1/2
=>x=22/7

Total time=50 min= 3000 sec

So, speed=22/(3000×7)=22/21000 m/s

PLZ MARK IT AS BRAINLIEST..

Answer 2

Diameter of track = 1m

Radius of track = D/2 = 1/2 m

Circumference of track -

2πr

= 2 × 22/7 × 1/2

or, 22/7 m

So, the distance which cyclist covers in 50minutes is 22/7 m.

50 minutes = (50×60)seconds = 3000seconds.

So, speed = distance/Time
= 22/7 ÷ 3000
=22/7 × 1/3000
=22/21000 m/s

Answer) speed of cyclist = 22/21000 m/s