Question

A 6-kg bag of fertilizer covers a rectangular area of 2.5 m by 5.0 m.

a) How many bags of fertilizer are needed for a
rectangular lawn measuring 7.5 m by 10.2 m?
b) A 6-kg bag of fertilizer costs $15.50.
How much does it cost to fertilize the lawn?

Answer 1

Given,

Mass of bag = 6 Kg

Area covered by the bag = 2.5 x 5 = 12.5 m²

a) Bags required to cover area = 7.5 x 10.2

= 76.5 m²

Number of bags, N =
`(76.5)/(12.5)`

N = 6.12 = 7 (approx.)

7 Bags of 6 Kg fertilizers will be needed to cover the area.

b) Cost of 6 Kg fertilizers = $15.50

Cost of 7 bags of 6 Kg fertilizers = 7 x $15.50

= $108.50.