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 |
$2.20 per m3 |
Betty's family paid $193 for water usage in the month of April. What is the most amount of water that they could have used in April?
Amount that Betty's family paid for the first 90 m
3 of water usage
= 90 x 1.90
= $171
Remaining amount that Betty's family paid for additional water usage
= 193 - 171
= $22
Additional water usage
that Betty's family paid for
= 22 ÷ 2.20
= 10 m
3Most amount of water that Betty's family could have used in April
= 90 + 10
= 100 m
3 Answer(s): 100 m
3