At a shop, packets of tea bags are sold only in boxes of 3. The cost of each box is $13.50. The mass of each packet of tea bags is 2.5 kg.
- What is the total mass of 9 such packets of tea bags?
- How much would 15 such packets of tea bags cost?
(a)
Mass of 1 packet of tea bags = 2.5 kg
Mass of 9 packets of tea bags
= 9 x 2.5
= 22.5 kg
(b)
Cost of 3 packets of tea bags = $13.50
Number of sets of 3 packets in 15 packets of tea bags
= 15 ÷ 3
= 5
Cost of 15 packets of tea bags
= 5 x 13.50
= $67.50
Answer(s): (a) 22.5 kg; (b) $67.50