The table shows the rates charged for the use of water in a country.
- Archie and his family used 15 units of water in February. How much did they pay for the usage of water in February?
- Raeann and her family paid $147.60 for the usage of water in March. How many units of water did they use in March?
(a)
Amount that Archie and his family paid for the usage of water
= 15 x 0.87
= $13.05
(b)
Amount that Raeann and her family paid for first 30 units of water
= 30 x 0.87
= $26.10
Amount that Raeann and her family paid for next 30 units of water
= 30 x 1.46
= $43.80
Amount that Raeann and her family paid for the remaining units of water
= 147.60 - 26.10 - 43.80
= $77.70
Remaining units of water that Raeann and her family used
= 77.70 ÷ 2.22
= 35
Total number of units of water that Raeann and her family used
= 30 + 30 + 35
= 95
Answer(s): (a) $13.05; (b) 95