The table shows the charge for water services provided by the utilities board.
Water consumption |
Rate |
40 m3 of water usage and below |
$1.30 per m3 |
Additional water usage above 40 m3 |
$1.70 per m3 |
Dana's family paid $69 for water usage in the month of November. What is the most amount of water that they could have used in November?
Amount that Dana's family paid for the first 40 m
3 of water usage
= 40 x 1.30
= $52
Remaining amount that Dana's family paid for additional water usage
= 69 - 52
= $17
Additional water usage
that Dana's family paid for
= 17 ÷ 1.70
= 10 m
3Most amount of water that Dana's family could have used in November
= 40 + 10
= 50 m
3 Answer(s): 50 m
3