Paper 1: Non-calculator June 2025, Question 18 6 marks
A 60 cm piece of wire is bent to form three sides of a rectangle. It is then attached to a fixed rod as shown in the diagram.
The area of the rectangle is A cm2
Show that A = x (60 – 2 x)
Reveal mark scheme
Work out the maximum value of A as x varies.
Reveal mark scheme