The table shows the rates charged for the use of water in a country.
- Tommy and his family used 35 units of water in April. How much did they pay for the usage of water in April?
- Victoria and her family paid $194.30 for the usage of water in May. How many units of water did they use in May?
(a)
Amount that Tommy and his family paid for the usage of water
= 35 x 0.91
= $31.85
(b)
Amount that Victoria and her family paid for first 40 units of water
= 40 x 0.91
= $36.40
Amount that Victoria and her family paid for next 40 units of water
= 40 x 1.41
= $56.40
Amount that Victoria and her family paid for the remaining units of water
= 194.30 - 36.40 - 56.40
= $101.50
Remaining units of water that Victoria and her family used
= 101.50 ÷ 2.03
= 50
Total number of units of water that Victoria and her family used
= 40 + 40 + 50
= 130
Answer(s): (a) $31.85; (b) 130
