Question

distance covered by minute hand in 1 hour is 94. 20 cm find the circumference of the circle whose radius is 12 CM​

Answer 1

`\large\boxed{75.4cm(1 d.p)}`

Explanation:

Important Information:

Circumference of a cirlce=
`\pi*diameter`

Diameter=
`2*radius`

Method:

The first step in working out the circumference of this cirlce is to work out the diameter. You can work this out by multiplying the radius of 12 by 2, this gives you 24cm. This is because the radius is half of the diameter.

The next step is to work out the circumference. You can do this by multiplying pi by the diameter of 24, this gives you
`27\pi` or 75.4cm (1 d.p).

Step by Step:

1) Multiply 12 by 2.

`12*2=24cm`

2) Multiply pi by 24.

`\pi*24=75.4cm(1 d.p)`