Question

The formula for the surface area of a cylinder is A=2pr(r+h).Find h if A=80p and r=5. The formula for the surface area of a cylinder is A=2pr(r+h).Find h if A=80p and r=5. @Mathematics

Answer 1

\[80p=2p*r(r+h)\]
\[40=r^2+r*h\]
\[40-5^2=5*h\]
h=3