The table shows the rates charged for the use of water in a country.
- Ahmad and his family used 15 units of water in March. How much did they pay for the usage of water in March?
- Victoria and her family paid $85.70 for the usage of water in April. How many units of water did they use in April?
(a)
Amount that Ahmad and his family paid for the usage of water
= 15 x 0.78
= $11.70
(b)
Amount that Victoria and her family paid for first 30 units of water
= 30 x 0.78
= $23.40
Amount that Victoria and her family paid for next 30 units of water
= 30 x 1.26
= $37.80
Amount that Victoria and her family paid for the remaining units of water
= 85.70 - 23.40 - 37.80
= $24.50
Remaining units of water that Victoria and her family used
= 24.50 ÷ 2.45
= 10
Total number of units of water that Victoria and her family used
= 30 + 30 + 10
= 70
Answer(s): (a) $11.70; (b) 70
