Question

how long will a man take to make a round of a circular field of radius 42 metres cycling at a speed of 10 km per hour

Answer 1

Answer:

Step-by-step explanation:

Radius= 42m.

Distance to be travelled= Circumference of the circle.

=2×(22/7)×radius.

=44/7×42.

=44×6. {42 is cut by 7 (6times)}.

=264m=(264/1000)km=0.264km.

Time=distance/speed.

=0.264/10

=0.0264 hours.

Let's convert it in minutes.

=0.0264×60.

=1.584minutes.

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Answer 2

Answer:

radius given = 42m

circumference=2πr

= 2x22/7x42

=44x6

=264m

speed= 10km/hour

264m=0.264km

time=distance/speed

=0.264/10

=0.0264hour

Step-by-step explanation:

if required in minutes

0.0264x60

=1.5840min

1.584min