The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 550 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 550 g
= 2.50 + 0.30
= $2.80
(b)
1 kg = 1000 g
1.6 kg = 1.6 x 1000 = 1600 g
Cost for first 500 g = $2.50
Remaining mass
= 1600 - 500
= 1100 g
Number of sets of 50 g
= 1100 ÷ 50
= 22
Cost for remaining 1100 g
= 22 x 0.30
= $6.60
Postage cost of the parcel with a mass of 1.6 kg
= 6.60 + 2.50
= $9.10
Answer(s): (a) $2.80 (b) $9.10