Question

Small circular disks are being cut from thin sheets of steel. The steel weighs 1.6 grams per square centimeter. The disks need to have a diameter of 5 centimeters.

(A) find the area of the disk to the nearest hundredth of a square centimeter. Show the steps in your calculation.

Answer 1

`A = 19.63cm^2`

Explanation:

Given

`d =5cm`

`Weight = 1.6g/cm^2`

Required

The area (A) of the disk

This is calculated as:

`A = (\pi * d^2)/(4)`

So, we have:

`A = (3.14 * 5^2)/(4)`

`A = (3.14 * 25)/(4)`

`A = (78.5)/(4)`

`A = 19.625`

`A = 19.63cm^2` --- approximated