Mathematics · May / June 2021 · Paper 42 · Question 8

[L =] 11.8 [W =] 5.9 [H =] 7.1 [5]

M1 for L = 2W oe soi

M1 for W + 2H = 20.1 oe

M1 for 2L + 2H = 37.8 oe

B1 for at least one correct answer

0.559 to 0.56[0…] g/cm3 or g cm–3 final answer [9]

B4 M2 for 1 18 15 2 2 3 × × × 24 − 18 isw conversion

or M1 for h2 + 182 = 242 oe or better

M1 for figs 800 ÷ figs their volume isw B1

34.1 or 34.11 to 34.12 [4]

24 2 − 18 2

M3 for tan [ ] = oe 18 2 + 15 2

or M2 for 18 2 + 15 2 isw 2 + 2 or 24 15 isw

or M1 for 182 + 152 isw or 242 + 152 isw

or M1 for indicating required angle is EBD