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 1.7 kg?
(a)
Postage cost of the parcel with a mass of 550 g
= 2.10 + 0.40
= $2.50
(b)
1 kg = 1000 g
1.7 kg = 1.7 x 1000 = 1700 g
Cost for first 500 g = $2.10
Remaining mass
= 1700 - 500
= 1200 g
Number of sets of 50 g
= 1200 ÷ 50
= 24
Cost for remaining 1200 g
= 24 x 0.40
= $9.60
Postage cost of the parcel with a mass of 1.7 kg
= 9.60 + 2.10
= $11.70
Answer(s): (a) $2.50 (b) $11.70