The table shows the charge for water services provided by the utilities board.
Water consumption |
Rate |
90 m3 of water usage and below |
$1.90 per m3 |
Additional water usage above 90 m3 |
$2.10 per m3 |
Anna's family paid $192 for water usage in the month of March. What is the most amount of water that they could have used in March?
Amount that Anna's family paid for the first 90 m
3 of water usage
= 90 x 1.90
= $171
Remaining amount that Anna's family paid for additional water usage
= 192 - 171
= $21
Additional water usage
that Anna's family paid for
= 21 ÷ 2.10
= 10 m
3Most amount of water that Anna's family could have used in March
= 90 + 10
= 100 m
3 Answer(s): 100 m
3