A gardener uses this formula to work out how much he charges to make a lawn. C = (7(14+A))/3. C is the charge in £, A is the area in m^2. He makes a rectangular lawn measuring 12.5 m by 17.6 m. How much does he charge? [3 marks]
Rectangular Lawn of 12.5 x 17.6m. (Draw Rectangle) Area=LengthHeight A=12.517.6 A=220m^2
Substitute into formula: C=(7(14+A))/3 C=(7(14+220))/3 C=(7(234))/3 C=(1638)/3 C=546
The gardener will charge £546.
JF
Related Maths GCSE answers
All answers ▸Solve the simultaneous equations. 2x + y = 18, x−y=6
You are told that y is proportional to x^2 and that y=75, x=5. Find a formula for y in terms of x.
I don't understand how to solve quadratic inequalities?
A car costs £1200 in a sale. It was reduced by 20%. What was the original price?