In her metalwork class, Anja cut a square of tin, of edge 3.7 cm, from a larger square of
edge 6.3 cm. What area of tin was left?

Given:

Anju cut square of tin, of edge 3.7 cm, from a larger square of edge 6.3 cm.

To find:

The area of the remaining tin.

Solution:

Area of a square is:

Where, a is the edge of the square.

Area of the smaller square is:

Area of the larger square is:

The area of the remaining tin is:

Therefore, the area of the remaining tin is 26 sq. cm.

154 cu. in

Step-by-step explanation:

The space you have to measure is a cylinder.

Its height is the same as the height of the pipe, 16 inches.

Its diameter =inner diameter of pipe

= outer diameter of pipe - thickness of walls at each end of diameter

= 6 - 2(1.25)

= 3.5 inches

radius r = 1.75 inches

A cross-section of the cylindrical space is a circle.

area of circle = πr² = π * 1.75² = 9.625

volume = area of circle * height

9.625 * 16

= 154 cu. in.