This is the answer, too lazy too type it out
Answer:
243 in.²
Step-by-step explanation:
A = bh
⇒ A = 13.5 × 18 = 243
The ratio of the volume of pipe a to the volume of pipe b is 27:1 .
<h3>What is cylinder?</h3>
A cylinder is a three-dimensional shape consisting of two parallel circular bases, joined by a curved surface. The center of the circular bases overlaps each other to form a right cylinder.
Given that,
Radius of pipe a is 6 cm, and the radius of pipe b is 2 cm.
We know that the volume of cylinder is :- 
where r is radius and h is height of the cylinder.
If two figures are similar then ratio of volume is equal to the cube of any dimension.
The ratio of the volume of Pipe a to the volume of Pipe b :-

= 
Hence, The ratio of the volume of pipe a to the volume of pipe b is 27:1 .
To learn more about cylinder from the given link:
brainly.com/question/1392572
#SPJ4
Answer:
2,250
Step-by-step explanation:
For area you have to multiply the base and width. So 90 times 25 and then you get the answer of 2,250.
I did 15/5 which equaled 3.
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