Arectangle has an area of 12 square centimeters and a perimeter of 16 centimeters. which of the following could be its dimensions?
a: 2 cm and 6 cm
b: 3 cm and 4 cm
c: 1.5 cm and 8 cm
d: 1 cm and 12 cm

Option A 2 cm and 6 cm

Step-by-step explanation:

A rectangle has an area of 12 square centimeters and a perimeter of 16 cm.

We have to find the dimensions of the rectangle.

Let the length of perimeter = x and width of y cm

so area = x × y = 12 (1)

and perimeter = 2 (x+y) = 16

                          x + y = 8 (2)

Now x = (8-y)

So from equation (1)

y(8-y) = 12

8y - y² = 12

y² - 8y + 12 = 0

y² - 6y - 2y + 12 = 0

y(y-6) -2 ( y - 6 ) = 0

( y-2 ) ( y-6 ) = 0 ⇒ y = z or y = 6

Now we put the values of y in equation (1)

                     x × y = 12

for y = 2        2x = 12

                      x = 6

for y = 6        6x = 12

                      x = 2

Therefore, possible dimensions may be 2 and 6 cm.

Option A 2 cm and 6 cm

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

hreryryrranswer:

step-by-step explanation: