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 2.9 kg?
(a)
Postage cost of the parcel with a mass of 750 g
= 3.90 + 0.30
= $4.20
(b)
1 kg = 1000 g
2.9 kg = 2.9 x 1000 = 2900 g
Cost for first 700 g = $3.90
Remaining mass
= 2900 - 700
= 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 2.9 kg
= 13.20 + 3.90
= $17.10
Answer(s): (a) $4.20 (b) $17.10