The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 900 g?
- How much is the postage if a parcel has a mass of 1.1 kg?
(a)
Postage cost of the parcel with a mass of 900 g
= 2.55 + 0.40
= $2.95
(b)
1 kg = 1000 g
1.1 kg = 1.1 x 1000 = 1100 g
Cost for first 800 g = $2.55
Remaining mass
= 1100 - 800
= 300 g
Number of sets of 100 g
= 300 ÷ 100
= 3
Cost for remaining 300 g
= 3 x 0.40
= $1.20
Postage cost of the parcel with a mass of 1.1 kg
= 1.20 + 2.55
= $3.75
Answer(s): (a) $2.95 (b) $3.75