The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 350 g?
- How much is the postage if a parcel has a mass of 1.6 kg?
(a)
Postage cost of the parcel with a mass of 350 g
= 3.90 + 0.70
= $4.60
(b)
1 kg = 1000 g
1.6 kg = 1.6 x 1000 = 1600 g
Cost for first 300 g = $3.90
Remaining mass
= 1600 - 300
= 1300 g
Number of sets of 50 g
= 1300 ÷ 50
= 26
Cost for remaining 1300 g
= 26 x 0.70
= $18.20
Postage cost of the parcel with a mass of 1.6 kg
= 18.20 + 3.90
= $22.10
Answer(s): (a) $4.60 (b) $22.10