Question

Mary is wrapping a can of paint as a gag gift for a friend. If the can is 11 cm high and has a diameter of 7 cm, how many sq.cm of wrapping paper will she use in completely covering the can?

Answer 1

Answer:

Mary needs a gift wrap of 318.71 cm²

Step-by-step explanation:

Given :

Hight of paint can = 11 cm

Diameter of can = 7 cm

Find :

How many sq.cm of wrapping paper

Solution :

Find the radius

Diameter of can = 7 cm

⇒ 7 / 2

⇒ 3.5

Radius = 3.5 cm

As we know that formula of Total Surface Area (TSA)

TSA = 2 π r (r + h)

⇒ 2 × 3.14 × 3.5 (3.5 + 11)

⇒ 2 × 3.14 × 3.5 × 14.5

⇒ 2 × 3.14 × 50.75

⇒ 2 × 159.355

⇒ 318.71

Therefore,

Mary needs a gift wrap of 318.71 cm²

Answer 2

Step-by-step explanation:

Hight of can = 11cm

Diameter of can = 7 cm

radius = 7/2 = 3.5 cm

Now,

TSA = 2 π r (r + h)

=> 2 × 3.14 × 3.5 (3.5 + 11)

=> 2 × 3.14 × 3.5 × 14.5

=> 2 × 3.14 × 50.75

=> 2 × 159.355

=> 318.71 sq. cm Ans...