Question

A 6kg 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 fertlize the lawn?

Answer 1

Given,

Mass of bag = $6 Kg$

Area covered by the bag = $2.5 x 5 = 12.5 m^2$

a) Bags required to cover area

$7.5 x 10.2\\= 76.5 m^2$

Number of bags, $N = \frac{76.5}{12.5}$                                

= $6.12 = 7 (approx.)$

$7$ 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

$7 x 15.50\\= 108.50.$