At a shop, packets of coffee powder are sold only in boxes of 3. The cost of each box is $3.20. The mass of each packet of coffee powder is 1.5 kg.
- What is the total mass of 7 such packets of coffee powder?
- How much would 12 such packets of coffee powder cost?
(a)
Mass of 1 packet of coffee powder = 1.5 kg
Mass of 7 packets of coffee powder
= 7 x 1.5
= 10.5 kg
(b)
Cost of 3 packets of coffee powder = $3.20
Number of sets of 3 packets in 12 packets of coffee powder
= 12 ÷ 3
= 4
Cost of 12 packets of coffee powder
= 4 x 3.20
= $12.80
Answer(s): (a) 10.5 kg; (b) $12.80