The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 600 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 600 g
= 2.50 + 0.70
= $3.20
(b)
1 kg = 1000 g
2.2 kg = 2.2 x 1000 = 2200 g
Cost for first 500 g = $2.50
Remaining mass
= 2200 - 500
= 1700 g
Number of sets of 100 g
= 1700 ÷ 100
= 17
Cost for remaining 1700 g
= 17 x 0.70
= $11.90
Postage cost of the parcel with a mass of 2.2 kg
= 11.90 + 2.50
= $14.40
Answer(s): (a) $3.20 (b) $14.40