Mathematics (9-1) J560 9-1: Approximation and Estimation Topical Past Paper Questions

A bronze ornament has a volume of $198\mathrm{cm}^{3}$. The density of bronze is 8.9 g/cm $ ^{3} $. By rounding each value correct to one significant figure, work out an estimate for the mass of the bronze ornament. .....g [3]

Here is a right-angled triangle. The area of the triangle is $ 100\,cm^{2} $, correct to the nearest $ 10\,cm^{2} $. The length of the base of the triangle is 8 cm, correct to the nearest cm. Calculate the largest possible height of the triangle. cm [4]

Force is measured in newtons (N). A force of 198.5N is applied to a rectangular surface of length 4.9cm and width 4.1cm. Work out an estimate of the pressure, in N/cm², applied to this rectangular surface. [The formula for pressure is: Pressure = $ \frac{Force}{Area} $] $$ \mathr…