The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 700 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 700 g
= 3.30 + 0.60
= $3.90
(b)
1 kg = 1000 g
2.9 kg = 2.9 x 1000 = 2900 g
Cost for first 600 g = $3.30
Remaining mass
= 2900 - 600
= 2300 g
Number of sets of 100 g
= 2300 ÷ 100
= 23
Cost for remaining 2300 g
= 23 x 0.60
= $13.80
Postage cost of the parcel with a mass of 2.9 kg
= 13.80 + 3.30
= $17.10
Answer(s): (a) $3.90 (b) $17.10