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 1.8 kg?
(a)
Postage cost of the parcel with a mass of 750 g
= 40 + 0.80
= $40.80
(b)
1 kg = 1000 g
1.8 kg = 1.8 x 1000 = 1800 g
Cost for first 700 g = $40
Remaining mass
= 1800 - 700
= 1100 g
Number of sets of 50 g
= 1100 ÷ 50
= 22
Cost for remaining 1100 g
= 22 x 0.80
= $17.60
Postage cost of the parcel with a mass of 1.8 kg
= 17.60 + 40
= $57.60
Answer(s): (a) $40.80 (b) $57.60
