At a supermarket, packets of cookies are sold only in boxes of 4. The cost of each box is $8.70. The mass of each packet of cookies is 2.8 kg.
- What is the total mass of 9 such packets of cookies?
- How much would 8 such packets of cookies cost?
(a)
Mass of 1 packet of cookies = 2.8 kg
Mass of 9 packets of cookies
= 9 x 2.8
= 25.2 kg
(b)
Cost of 4 packets of cookies = $8.70
Number of sets of 4 packets in 8 packets of cookies
= 8 ÷ 4
= 2
Cost of 8 packets of cookies
= 2 x 8.70
= $17.40
Answer(s): (a) 25.2 kg; (b) $17.40