The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 400 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 400 g
= 2.00 + 0.60
= $2.60
(b)
1 kg = 1000 g
1.7 kg = 1.7 x 1000 = 1700 g
Cost for first 300 g = $2.00
Remaining mass
= 1700 - 300
= 1400 g
Number of sets of 100 g
= 1400 ÷ 100
= 14
Cost for remaining 1400 g
= 14 x 0.60
= $8.40
Postage cost of the parcel with a mass of 1.7 kg
= 8.40 + 2.00
= $10.40
Answer(s): (a) $2.60 (b) $10.40