Geometry? Or Physics?

Classical Mechanics Level 1

A cyclist goes around a circular track of radius x x meters in 2 minutes. If his speed (linear) is 5.5 ms − 1 \text{ms}^{-1} , What is the radius of the track?

Answer in meters.


The answer is 105.

Mehul Arora by Mehul Arora , 20, India

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1 solution

Mehul Arora
Jun 16, 2015

Distance Covered = Speed × \times Time.

Distance covered= 5.5 × 120 5.5 \times 120

= 660 m =660 m

The cyclist goes once around the CIRCUMFERENCE of the track.

Therefore:- 2 × 22 7 × x = 660 m 2 \times \dfrac{22}{7} \times x= 660m

x = 105 x=105 m

Answer:- 105 \boxed {105}

4 Helpful 0 Interesting 1 Brilliant 0 Confused

why was there a '-1' in power , what to do with it , just ignore it ?

Kavya Soni - 1 year, 3 months ago

and what does it mean ?

Kavya Soni - 1 year, 3 months ago

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