Answer:
£ 186.20
Explanation:
height = 6 cm = 0.06 m
Volume of gravel drive away = length * width * height
= 11 * 4 * 0.06
= 2.64 m³
Number of gravel bags needed = 2.64 ÷ 0.4
= 6.6
7 bags are to be purchased by him.
Cost of a bag = £ 38
Cost of 7 bags = 38 * 7 = £ 266
Discount = 30% of 266
= £ 79.80
Amount paid by Martin = 266 - 79.80
= £ 186.20