The table shows the rates charged for the use of water in a country.
- Brandon and his family used 15 units of water in January. How much did they pay for the usage of water in January?
- Esther and her family paid $126.75 for the usage of water in February. How many units of water did they use in February?
(a)
Amount that Brandon and his family paid for the usage of water
= 15 x 0.77
= $11.55
(b)
Amount that Esther and her family paid for first 30 units of water
= 30 x 0.77
= $23.10
Amount that Esther and her family paid for next 30 units of water
= 30 x 1.43
= $42.90
Amount that Esther and her family paid for the remaining units of water
= 126.75 - 23.10 - 42.90
= $60.75
Remaining units of water that Esther and her family used
= 60.75 ÷ 2.43
= 25
Total number of units of water that Esther and her family used
= 30 + 30 + 25
= 85
Answer(s): (a) $11.55; (b) 85
