Question

MATH HELP? PLEASE

The cylinder shown below has a radius of 9 inches and a height of 31 inches.



What is the approximate lateral area of the cylinder? Use 22/7 for pi.

1,131.43 in2

1,753.71 in2

2,262.86 in2

876.86 in2

Answer 1

The lateral area formula for a cylinder is LA = 2πrh.
THerefore, just plug numbers in.
2(π)(9)(31) = 558π. That's the exact value. If you want approximate, solve for it using 3.14 for π. It is 1753.71.

Answer 2

is it 1,753.71 in2

Answer 3

way go calcmathlete

Answer 4

What about this one? CAN YOU EXPLAIN TOO :)

A cone with a radius of 16 feet and a slant height of 27 feet is shown below.



What is the surface area of this cone? Use for pi.

2,162.29 square feet

4,324.57 square feet

1,357.71 square feet

3,648.86 square feet

Answer 5

You can do it TIm. I forgot the formula for a cone :P

Answer 6

Use 22/7 for pi.

Answer 7

i think it is pi*r*l

Answer 8

the formula for the surface area is πrs + πr2

the r is the radius and s is th slant height

Answer 9

is it 1,357.71 square feet

Answer 10

It's πr^2 + πrl

Answer 11

oop the formula actually is πrs + πr^2

Answer 12

for tsa=πrs + πr^2
for lsa= πrs

Answer 13

Thank you guys soooo much!