The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 350 g?
- How much is the postage if a parcel has a mass of 2.5 kg?
(a)
Postage cost of the parcel with a mass of 350 g
= 2.25 + 0.30
= $2.55
(b)
1 kg = 1000 g
2.5 kg = 2.5 x 1000 = 2500 g
Cost for first 300 g = $2.25
Remaining mass
= 2500 - 300
= 2200 g
Number of sets of 50 g
= 2200 ÷ 50
= 44
Cost for remaining 2200 g
= 44 x 0.30
= $13.20
Postage cost of the parcel with a mass of 2.5 kg
= 13.20 + 2.25
= $15.45
Answer(s): (a) $2.55 (b) $15.45