The table shows the charge for water services provided by the utilities board.
Water consumption |
Rate |
90 m3 of water usage and below |
$1.50 per m3 |
Additional water usage above 90 m3 |
$1.80 per m3 |
Tiffany's family paid $153 for water usage in the month of April. What is the most amount of water that they could have used in April?
Amount that Tiffany's family paid for the first 90 m
3 of water usage
= 90 x 1.50
= $135
Remaining amount that Tiffany's family paid for additional water usage
= 153 - 135
= $18
Additional water usage
that Tiffany's family paid for
= 18 ÷ 1.80
= 10 m
3Most amount of water that Tiffany's family could have used in April
= 90 + 10
= 100 m
3 Answer(s): 100 m
3