Question

A garden is in the shape of a rectangle, ABCD, and a semicircle.

AD is the diameter of the semicircle.

Carol is going to cover the garden with fertiliser.
A box of fertiliser costs £4.99
Carol has been told that one box of fertiliser will cover 12 m? of garden.

(a) Work out the cost of buying enough fertiliser to cover the garden completely.

Answer 1

34.93

Explanation:

find area of semicircle=(pi×radius squared)/2=27.7

find area of rectangle=base×height=47.04

74.74=total area

if one box covers 12 how many boxes cover 74.74=6.2283 but you cannot buy .2283 of fertiliser so you round up to 7 boxes

so total cost becomes 7×4.99=34.93