Question

an oil distributes oil in the metal can shaped as an cylinder that has an actual radius of 5.1 cm and the height of 15.1 cm. a worker incorrectly measured the radius of 5 cm and the height of 15 cm determine the relative error in calculating the surface area to the nearest thousandth

Answer 1

well first find the area (2pi*5.1) * (15.1) +(2pi*5.1^2) and subtract the are of (2pi*5) * (15) + 2(pi*5^2)

Answer 2

find the difference.

Answer 3

it's 18.975 I think, it sort of matters if the can has a lid though. that's why I said to calculate for 2 times the area of the circle.

Answer 4

the answer is 0.0029 but i wanna know how did they get the answer im very confused

Answer 5

A difference of 18.975 cm sq is correct when considering the lids. It would have to have a lid if the can is used to distribute the oil.

Answer 6

oh, sorry
it asks for relative error, so you have to take the number 18.975 and divide it by the total area

Answer 7

Would the total area be the area of the correct dimension?

Answer 8

it should be, (which is about 647.294cm sq) but I got .0293... hmmmm....

Answer 9

maybe quanna copied answer incorrectly (like an extra 0)

Answer 10

I also wonder if Pi was used correct to a thousandth???

Answer 11

Anyway my calculations agree with jibblesmgee.