Question

the the diameter of a circular Garden is 140 metre . On its outside there is a road of 7 metre wide find out the outer circumference of the road ​

Answer 1

484 meters

Explanation:

diameter of a circular Garden = 140 metre

we know diameter = 2*radius

140 = 2*radius

radius = 140/2 = 70 meter

thus, radius of garden is 70 meter

Given that

On its outside there is a road of 7 metre wide

Thus, radius of garden along-with road will increase by 7 meters

Total radius of garden and road = 70 meter + 7 meter = 77 meter

outer circumference of the road can be calculated using radius 77 meter.

we know that circumference =
`2\pi r`

we will use value of
`\pi = 22/7`

Thus, outer circumference of the road ​ with radius 77 m

=
`2\pi r \\=>2*22/7 *77\\=> 44*11 = 484`

Thus,

The outer circumference of the road ​is 484 meters.