The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 450 g?
- How much is the postage if a parcel has a mass of 1.7 kg?
(a)
Cost
= 3.70 + 0.40
= $4.10
(b)
1 kg = 1000 g
1.7 kg = 1.7 x 1000 = 1700 g
Cost for first 350 g = $3.70
Remaining mass
= 1700 - 350
= 1350 g
Number of sets of 100 g
= 1350 ÷ 100
= 13.5
Number of sets of 100 g to pay for
= 13 + 1
= 14
Cost for remaining 1350 g
= 14 x 0.40
= $5.60
Total cost
= 5.60 + 3.70
= $9.30
Answer(s): (a) $4.10; (b) $9.30