Question

A circular piece of metal has a radius of 3.5 meters.
The metal sells for $3.25 per square meter.

What is the total cost of the circular piece of metal?



A.
$11.38


B.
$38.47


C.
$71.44


D.
$125.01

Answer 1

@10115658

Answer 2

square meter is the unit for area
the area of a circle is pi*r^2
given r = 3.5 and using pi as 3.14 find the area
let the area = x
one unit of area sells for 3.25 so x units of area sells for 3.25*x

Answer 3

so 3.14 x 3.5 (which is actually 12.25)