Question

Marta is solving the equation S = 2πrh + 2πr2 for h. Which should be the result?

StartFraction S Over 2 pi r EndFraction equals h. – r = h
StartFraction S minus r Over 2 pi r EndFraction equals h. = h
S – S minus StartFraction r Over 2 pi EndFraction equals h. = h
S – S minus StartFraction 2 pi Over r EndFraction equals h. = h

Answer 1

h = (S - 2πr2)/2πr

Explanation:

S - 2πr2 = 2πrh Subtract both sides by 2πr2;

(S - 2πr2)/2πr = h Divide both sides by 2πr;

h = (S - 2πr2)/2πr Replace sides.