The table shows the rates charged for the use of water in a country.
- Wesley and his family used 25 units of water in February. How much did they pay for the usage of water in February?
- Raeann and her family paid $126.30 for the usage of water in March. How many units of water did they use in March?
(a)
Amount that Wesley and his family paid for the usage of water
= 25 x 0.83
= $20.75
(b)
Amount that Raeann and her family paid for first 30 units of water
= 30 x 0.83
= $24.90
Amount that Raeann and her family paid for next 30 units of water
= 30 x 1.15
= $34.50
Amount that Raeann and her family paid for the remaining units of water
= 126.30 - 24.90 - 34.50
= $66.90
Remaining units of water that Raeann and her family used
= 66.90 ÷ 2.23
= 30
Total number of units of water that Raeann and her family used
= 30 + 30 + 30
= 90
Answer(s): (a) $20.75; (b) 90