The surface area of the cylinder should be 1130.97. I found this by using the formula a=2πrh+2πr2.
Good luck my bud.
It would take him 40 weeks.
Hope this helps!!
For me cross multiplying works really well.
3(5+5)
Expand brackets
5+5 is 10
3(10) which is 3*10
answer is 30
