The table shows the charge for water services provided by the utilities board.
Water consumption |
Rate |
70 m3 of water usage and below |
$1.90 per m3 |
Additional water usage above 70 m3 |
$2.20 per m3 |
Natalie's family paid $144 for water usage in the month of July. What is the most amount of water that they could have used in July?
Amount that Natalie's family paid for the first 70 m
3 of water usage
= 70 x 1.90
= $133
Remaining amount that Natalie's family paid for additional water usage
= 144 - 133
= $11
Additional water usage
that Natalie's family paid for
= 11 ÷ 2.20
= 5 m
3Most amount of water that Natalie's family could have used in July
= 70 + 5
= 75 m
3 Answer(s): 75 m
3