Volume of a cylinder

I seem to have run in to a problem with an assignment part A- Having radius r1=8 and height h1=15 Calculate volume of cylinder V1 (formula v=pi*r^2*h)

>>r1=8
>>h1=15
>>V1=pi*(r1^2)*h1

Now here's the problem, Part B- Using h1 from part A find radius r2 of another cylinder V2 that has a volume greater by 20% than that of V1. If anyone could guide me through part B

[Adam]

What are you having trouble with? The maths or the coding of the maths? The coding seems very simple once you have written down the relevant equation.

Answer 1

[James Tursa]

Seems like you have this information:

V1 = pi*(r1^2)*h1   <-- this is all known
V2 = 1.2 * V1       <-- this is given
V2 = pi*(r2^2)*h1   <-- this is volume of V2 using r2 and h1

You just need to solve for r2 using the above.

[Rashawn Bowen]

how is 1.2 20%

[John D'Errico]

If 1 is 100%. Then what number is 20% larger than 1?

Spolier: 1.2