Question

Cylinder A has a radius of 7 inches and a height of 5 inches. Cylinder B has a volume of 490π. What is the percentage change in volume from cylinder A to cylinder B?
50% decrease
75% increase
150% decrease
100% increase

Answer 1

Answer:

the answer is D

Step-by-step explanation:

Answer 2

Percentage change is 100% increase.

Step-by-step explanation:

• Step 1: Find volume of cylinder A using equation, V(A) = πr²h, where r = 7 in and h = 5 in

⇒ V(A) = π × 7 × 7 × 5 = 245π

and V(B) = 490π

• Step 2: Calculate percentage change from V(A) to V(B)

⇒ % change = [V(B) - V(A)/V(A)] × 100 = (490π - 245π/245π) × 100

                     = 245π/245π × 100 = 100% increase