The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 750 g?
- How much is the postage if a parcel has a mass of 1.2 kg?
(a)
Cost
= 2.10 + 0.60
= $2.70
(b)
1 kg = 1000 g
1.2 kg = 1.2 x 1000 = 1200 g
Cost for first 650 g = $2.10
Remaining mass
= 1200 - 650
= 550 g
Number of sets of 100 g
= 550 ÷ 100
= 5.5
Number of sets of 100 g to pay for
= 5 + 1
= 6
Cost for remaining 550 g
= 6 x 0.60
= $3.60
Total cost
= 3.60 + 2.10
= $5.70
Answer(s): (a) $2.70; (b) $5.70