This is a Ditloid
The answer is 7 Hills of Rome.
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Since r varies directly with s, we have r = ks (replace k with 5 and s with 7) r = (5)(7) r = 35
If P varies jointly as q, r and s - assume this is in direct proportion, then P ∝ qrs so P = kqrs where k is a constant.70 = k x 7 x 5 x 4 = 140k : k = 140/70 = 0.5When q = 2, r = 15 and s = 7 then,P = 0.5 x 2 x 15 x 7 = 105
It is an equation and if 4h-6 = 22 then h = 7
S = 2 pi r h + 2 pi r2S - 2 pi r2 = 2 pi r hh = (S - 2 pi r2) / (2 pi r)