A cylinder has a radius of 4 inches and a height of 5 inches. If the radius of the cylinder is tripled and the height remains the same to create a new cylinder, what will be the difference in the surface areas of the two cylinders? Answer in terms of Pi.

A cylinder has a radius of 4 inches and a height of 5 inches. If the radius of the cylinder is tripled and the height remains the same to create a new cylinder, what will be the difference in the surface areas of the two cylinders ? Answer in terms of Pi.

A cylinder has a radius of 4 inches and a height of 5 inches.

If the radius of the cylinder is tripled and the height remains the same to create a new cylinder, what will be the difference in the surface areas of the two cylinders ?

Radius is 4 inches

Height is 5 inches

Radius is 3 × 4 = 12 inches [as in the question it is given that the radius of the cylinder is tripled]

Height is 5 inches

Now,

Surface area of 1st cylinder

is 2πr(r + h) = 2π × 4(4 + 5)

= 8π(9)

Surface area of 2nd cylinder

is 2πr(r + h) = 2π × 12(12 + 5)

= 24π(17)

The difference in the surface areas of the two cylinders is = = (408π - 72π) = 336π sq inches

i think it would be 43 movies that would have to be watched.

step-by-step explanation:

think about it. for the second plan, every month is 8 dollars. 8 x 12= 96. so thats the number for the second plan. now for the first plan, its annual meaning you have to pay 10 dollars every year. so now you have to get an equivalent amount of 86 since 96-10=86. 86 divided by 2 since every movie costs 2$ then you would have to watch 43 movies a year to get the same as the second plan. i really hoped this . have a wonderful day as well!

1 is c

2 is a

3 is a

step-by-step explanation: