The table shows the rates charged for the use of utility in a country.
- Glen and his family used 20 units of utility in March. How much did they pay for the usage of utility in March?
- Linda and her family paid $177.30 for the usage of utility in April. How many units of utility did they use in April?
(a)
Amount that Glen and his family paid for the usage of utility
= 20 x 0.93
= $18.60
(b)
Amount that Linda and her family paid for first 30 units of utility
= 30 x 0.93
= $27.90
Amount that Linda and her family paid for next 30 units of utility
= 30 x 1.29
= $38.70
Amount that Linda and her family paid for the remaining units of utility
= 177.30 - 27.90 - 38.70
= $110.70
Remaining units of utility that Linda and her family used
= 110.70 ÷ 2.46
= 45
Total number of units of utility that Linda and her family used
= 30 + 30 + 45
= 105
Answer(s): (a) $18.60; (b) 105
