Question

Janine made a cylindrical vase in which the sum of the lateral area and area of one base was about 3000 square centimeters. The vase had a height of 50 centimeters. Find the radius of the vase. Explain the method you would use to find the radius.

Answer 1

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Answer 2

lateral area of cylinder = circumference * height\[A _{l}=2\times \pi \times r \times h\ ...........(1)\]
area of base is given by\[A _{b}=\pi \times r ^{2}\ ...........(2)\]
\[A _{l}+A _{b}=3000=(2\times \pi \times r \times 50)+(\pi \times r ^{2})\ ........(3)\]
You can form a quadratic equation from (3) and one of the solutions is the radius.

Answer 3

is this the answer because i don't understand at all..lol

Answer 4

The quadratic equation is as follows:
\[\pi r ^{2}+100\pi r-3000=0\]
You need to solve this to find r the radius of the vase.

Answer 5

@Hero

Answer 6

8.78 cm

Answer 7

@kropot72

Answer 8

is my answer right 8.78 cm

Answer 9

How did you get that answer?