Question

A circular piece of glass has a radius of 0.8 meters. The glass sells for $4.60 per m².
What is the total cost of the circular piece of glass?
Use 3.14 for pi.


$2.01

$9.24

$23.11

$36.98

Answer 1

Radius = 0.8 m

Area = πr^2
= 3.14 × (0.8×0.8)
= 3.14 × 0.64
= 2.0096

Cost = area×rate
= 2.0097 × 4.60
= 9.24416
===============
Hence the cost will be $ 9.24

Answer 2

Radius = 0.8 m
Area = πr^2 = 3.14 x 0.8 x 0.8
= 2.0096 square m

Total cost of glass = 4.60 x 2.0096
= $ 9.24416

So your answer is $ 9.24