Mathematics · Oct / Nov 2021 · Paper 42 · Question 11

10.2 [2]

M1 for 13.6 YZ = 15.3 20.4 oe or better

143.1 [3]

2 20.4 × 63.6 oe

M2 for 13.6 2 2 20.4 13.6

or M1 for or oe 13.6 20.4 Alt method

M2 for ½ × 20.4 × 15.3 × sin R where − 63.6 1 R is sin × × 0.5 13.6 their (a)(i) − 63.6 1

or M1 for R = sin × × 0.5 13.6 their (a)(i)

0.55 [3]

2 3 37.5

M2 for [ratio of areas] = or 64.8 2 3 64.8 oe 37.5

or M1 for [ratio of lengths] = 3 37.5 or 64.8 3 64.8 oe 37.5 3 2 0.792 64.8 = or for oe x 37.5