Work out the area of a rectangle with base, b = 20mm and perimeter, P = 60mm. b
The diagram is not drawn to scale.​

base+perimeter

20mm+60mm

=80mm

expression #3 is not equivalent. the others are.

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere