Surface area of a cylinder = 2πrh+2πrsquared
= 2x3.14x4.5x12+2x3.14x20.25
= 339.12+127.17
= 466.29
Therefore, the surface area of a cylinder is 466.29cm
Julia could use the knuckle on her thumb to the thumb top which is approximately an inch and use that to measure.
30% = 0.30
0.30 × $75 = $22.50
Susan should put $22.50 in the bank to reach her goal.
