The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 600 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 600 g
= 2.80 + 0.70
= $3.50
(b)
1 kg = 1000 g
2.3 kg = 2.3 x 1000 = 2300 g
Cost for first 500 g = $2.80
Remaining mass
= 2300 - 500
= 1800 g
Number of sets of 100 g
= 1800 ÷ 100
= 18
Cost for remaining 1800 g
= 18 x 0.70
= $12.60
Postage cost of the parcel with a mass of 2.3 kg
= 12.60 + 2.80
= $15.40
Answer(s): (a) $3.50 (b) $15.40