1MA0 Higher November 2012 Paper 1 Q25
25 The diagram shows two similar solids, A and B.
Diagram NOT accurately drawn
Solid A has a volume of 80 cm\(^3\).
(a) Work out the volume of solid B. (2)
Solid B has a total surface area of 160 cm\(^2\).
(b) Work out the total surface area of solid A. (2)
| Answer | Mark | Notes |
|---|---|---|
| 640 | 2 | M1 for \(80 \times \left(\frac{8}{4}\right)^3\) or \(80 \div \left(\frac{4}{8}\right)^3\) A1 cao |
| Answer | Mark | Notes |
|---|---|---|
| 40 | 2 | M1 for \(160 \div \left(\frac{8}{4}\right)^2\) or \(160 \times \left(\frac{4}{8}\right)^2\) or ft their scale factor from (a) A1 cao |