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Maths urgent help needed

Since Unofficial Mark Scheme have been released, i've been comparing my results to it. However i realised i forged a 'show that question'. I got the given answer but since i was rushing i did dodgy working out.

How many marks for this method would i get? Or would examiners just look at my final answer and award full marks

Thanks in advance

[br][br]πr2h=75π[br]h=75/r2[br][br]2πr2[br][br]2πr(75/r2)=150π/r[br][br]C=3πr2+150π/r[br][br]\pi r^2 h = 75 \pi[br]h = 75/ r^2[br][br]2 \pi r^2 [br][br]2 \pi r (75 / r^2) = 150 \pi / r[br][br]C = 3 \pi r^2 + 150 \pi / r (x 2). [br][br]C=6πr2+300π/r[br][br][br][br]C = 6 \pi r^2 + 300 \pi / r[br][br]
(edited 8 years ago)
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