The table shows the charge for water services provided by the utilities board.
Water consumption |
Rate |
90 m3 of water usage and below |
$1.10 per m3 |
Additional water usage above 90 m3 |
$1.40 per m3 |
Roshel's family paid $113 for water usage in the month of January. What is the most amount of water that they could have used in January?
Amount that Roshel's family paid for the first 90 m
3 of water usage
= 90 x 1.10
= $99
Remaining amount that Roshel's family paid for additional water usage
= 113 - 99
= $14
Additional water usage
that Roshel's family paid for
= 14 ÷ 1.40
= 10 m
3Most amount of water that Roshel's family could have used in January
= 90 + 10
= 100 m
3 Answer(s): 100 m
3