Question

How do you solve this?

Answer 1

y = mx + b
- b - b
y - b = mx
m m
(y-b)/m = x

S = 2πr² + 2πrh
S = 2πr(r) + 2πr(h)
S = 2πr(r - h)
2πr 2πr
S/2πr = r - h
- r - r
(S/2πr) - r = -h
(-S/2πr) + r = h