The table shows the charge for water services provided by the utilities board.
Water consumption |
Rate |
70 m3 of water usage and below |
$1.40 per m3 |
Additional water usage above 70 m3 |
$1.70 per m3 |
Lucy's family paid $115 for water usage in the month of December. What is the most amount of water that they could have used in December?
Amount that Lucy's family paid for the first 70 m
3 of water usage
= 70 x 1.40
= $98
Remaining amount that Lucy's family paid for additional water usage
= 115 - 98
= $17
Additional water usage
that Lucy's family paid for
= 17 ÷ 1.70
= 10 m
3Most amount of water that Lucy's family could have used in December
= 70 + 10
= 80 m
3 Answer(s): 80 m
3