Question

How will long a man take to go once round a circular traxk of radius 4.2m if he runs at anaverage speed 6 km/hr

Answer 1

Heya Frnd ..........☺

Circumference of ⚫ = 2πr

=> 2 × 22/7 × 42/10

=> 26.4 m .............( 1 )

Now , speed of walking = 6km/h

= 6 × 5/18

= 5/3 m/s .........( 2 )

So,

$time \: = \: \frac{distance}{speed}$

=> 26.4 ÷ 5/3

= 26.4 × 3/5

=> 15.84 seconds ..............✴ANS✴

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HOPE IT WILL HELP U...............☝✔