The table shows the charge for water services provided by the utilities board.
Water consumption |
Rate |
60 m3 of water usage and below |
$1.40 per m3 |
Additional water usage above 60 m3 |
$1.90 per m3 |
Sarah's family paid $103 for water usage in the month of September. What is the most amount of water that they could have used in September?
Amount that Sarah's family paid for the first 60 m
3 of water usage
= 60 x 1.40
= $84
Remaining amount that Sarah's family paid for additional water usage
= 103 - 84
= $19
Additional water usage
that Sarah's family paid for
= 19 ÷ 1.90
= 10 m
3Most amount of water that Sarah's family could have used in September
= 60 + 10
= 70 m
3 Answer(s): 70 m
3