Question

A grease gun holds a cylindrical tube of grease that is 14 in. long and has a radius of 1.5 in. With each squeeze, 15 in3 of grease is used.

How many times can the grease gun be squeezed before it is empty? Use 3.14 to approximate pi, and express your answer as a whole number.

Answer 1

so first solve for for volume of grease held by tube

volume of cylinder=height times area of base
area of base=circle so
height times pi times radius^2
pi=aprox 3.14

height=14
radius=1.5

14 times 3.14 times 1.5^2=98.91 in^3 of grease

then divide
98.91/15=6.594
you can't squeeze the gun exactly 0.569 times so we round down and get
6
the answer is 6 times