The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 950 g?
- How much is the postage if a parcel has a mass of 1.1 kg?
(a)
Cost
= 2.20 + 0.70
= $2.90
(b)
1 kg = 1000 g
1.1 kg = 1.1 x 1000 = 1100 g
Cost for first 850 g = $2.20
Remaining mass
= 1100 - 850
= 250 g
Number of sets of 100 g
= 250 ÷ 100
= 2.5
Number of sets of 100 g to pay for
= 2 + 1
= 3
Cost for remaining 250 g
= 3 x 0.70
= $2.10
Total cost
= 2.10 + 2.20
= $4.30
Answer(s): (a) $2.90; (b) $4.30