Question

Help needed
http://prntscr.com/zak2e

Answer 1

what's wrong with my answer

Answer 2

You have all the variables. Start by writing down what you have in place of the variables in the equation. As such:

lateral area = 2prh (let's just say pi = p for simplicity)
base area = 2pr

Then you have lateral + base = 3000 with h = 50:
2prh + 2pr = 2pr(h + 1) = 102pr = 3000

So there's only one variable you don't know (r):
r = 3000/102p = 9.36

You got 9.3 which technically should be rounded to 9.4 but I don't see how that's wrong.

Answer 3

i followed this formula from the book
http://prntscr.com/zalc2

Answer 4

but my teacher says to still view this something is missing

Answer 5

base area is pi r^2
not 2pi r

Answer 6

I thought something was fishy there...

Answer 7

2pi r h + pi r^2 = 3000

Answer 8

and h=50
now find r

Answer 9

sorry for late reply :\