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 1.5 kg?
(a)
Postage cost of the parcel with a mass of 900 g
= 3.00 + 0.30
= $3.30
(b)
1 kg = 1000 g
1.5 kg = 1.5 x 1000 = 1500 g
Cost for first 800 g = $3.00
Remaining mass
= 1500 - 800
= 700 g
Number of sets of 100 g
= 700 ÷ 100
= 7
Cost for remaining 700 g
= 7 x 0.30
= $2.10
Postage cost of the parcel with a mass of 1.5 kg
= 2.10 + 3.00
= $5.10
Answer(s): (a) $3.30 (b) $5.10