Question

How many square inches of tin are needed to make the top of a can that is 10 inches in diameter? A) 62.8 in2 B) 78.5 in2 C) 227 in2 D) 314 in2

Answer 1

Area of a circle = PI*radius^2
10 inch diameter = 5 inch radius
Area = PI* 5^2
Area = 78.5398163397
Answer is B)

Answer 2

The correct answer is B) 78.5

Explanation:

As we know that

Area of a circle = π (r) ²

Radius will be 1/2d

Radius is 5 inches

So putting the values

Area = 3.14* 25

Area = 78.5398163397