Jawab:
(a.) 15.33 Litres of paint
(b.) 4 containers

Penjelasan dengan langkah-langkah:

Given that a hall with the:
Length (L) = 15 m
Width (W) = 8 m
Height (H) = 4 m
Surface area/litre (n) = 12 m²

(a.) Therefore the paint volume
to cover the walls is:
(H×(2×(L+W))) ÷ n =
(4×(2×(15+8))) ÷ 12 =
(4×(2×23)) ÷ 12 =
(2×23) ÷ 3 =
46 ÷ 3 =
15.33 Litres of paint

(b.) If the paint is sold in 5-litre container
Therefore the number of containers =
15.33 Litres of paint, divided by 5 litres
15.33 ÷ 5 =
3.066
4 containers

(xcvi)