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 1.4 kg?
(a)
Cost
= 2.10 + 0.40
= $2.50
(b)
1 kg = 1000 g
1.4 kg = 1.4 x 1000 = 1400 g
Cost for first 350 g = $2.10
Remaining mass
= 1400 - 350
= 1050 g
Number of sets of 100 g
= 1050 ÷ 100
= 10.5
Number of sets of 100 g to pay for
= 10 + 1
= 11
Cost for remaining 1050 g
= 11 x 0.40
= $4.40
Total cost
= 4.40 + 2.10
= $6.50
Answer(s): (a) $2.50; (b) $6.50