Question

The diameter of a circular field is 98 m.if a child walks at the rate of 14 m per minute,how long will it take to walk round the field once

Answer 1

Answer:

22 minutes

Step-by-step explanation:

Given

Diameter = 98 m

radius = diameter / 2

           = 98 m /2

           = 49 m

Speed of child = 14 m per minute .

Formula for perimeter

Circumference = 2 πr

                         = 2 × 22/7 × 49 m

                         = 2 × 22 × 7 m

                         = 2 × 154 m

                         = 308 m

The child travels 14 m per minute .

So 1 m is travelled in 1/14 minutes .

308 m is travelled in 1/14 × 308 minutes

                                = 22 minutes

The time taken will be 22 minutes.

Answer 2

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