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 2.3 kg?
(a)
Postage cost of the parcel with a mass of 900 g
= 2.75 + 0.60
= $3.35
(b)
1 kg = 1000 g
2.3 kg = 2.3 x 1000 = 2300 g
Cost for first 850 g = $2.75
Remaining mass
= 2300 - 850
= 1450 g
Number of sets of 50 g
= 1450 ÷ 50
= 29
Cost for remaining 1450 g
= 29 x 0.60
= $17.40
Postage cost of the parcel with a mass of 2.3 kg
= 17.40 + 2.75
= $20.15
Answer(s): (a) $3.35 (b) $20.15