Question

7.2 kg of fertiliser is spread evenly over three small lawns.
The areas of the lawns are 7 m2, 8 m2 and 9 m2.
How much fertiliser is used on each lawn?

Answer 1

Answer:area of first lawn =7m2

Area of second lawn =8m2

Area of third lawn =9m2

Total of three lawn =24m2

Total fertiliser =2.4kg

Which is evenly spread on three lawn

Average of 7.2kg of fertiliser spread on 24m2

Therefore fertiliser on 1 m2 =.3kg

Fertiliser on first lawn =2.1kg

Fertiliser on second lawn 2.4kg

Fertiliser on third lawn = 2.7 kg

Step-by-step explanation:

area

Answer 2

Answer:

2.1 kg, 2.4 kg , 2.7 kg.

Step-by-step explanation:

ratio of area's = 7 : 8 : 9

sum of ratio= 7+8+9= 24

fertilizer used in first lawn= 7.2×7/24= 2.1 kg

fertilizer used in second lawn = 7.2×8/24= 2.4 kg

fertilizer used in third lawn = 7.2×9/24 = 2.7 kg