The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 900 g?
- How much is the postage if a parcel has a mass of 2.2 kg?
(a)
Postage cost of the parcel with a mass of 900 g
= 30 + 0.30
= $30.30
(b)
1 kg = 1000 g
2.2 kg = 2.2 x 1000 = 2200 g
Cost for first 850 g = $30
Remaining mass
= 2200 - 850
= 1350 g
Number of sets of 50 g
= 1350 ÷ 50
= 27
Cost for remaining 1350 g
= 27 x 0.30
= $8.10
Postage cost of the parcel with a mass of 2.2 kg
= 8.10 + 30
= $38.10
Answer(s): (a) $30.30 (b) $38.10