The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 650 g?
- How much is the postage if a parcel has a mass of 1.9 kg?
(a)
Postage cost of the parcel with a mass of 650 g
= 2.80 + 0.60
= $3.40
(b)
1 kg = 1000 g
1.9 kg = 1.9 x 1000 = 1900 g
Cost for first 600 g = $2.80
Remaining mass
= 1900 - 600
= 1300 g
Number of sets of 50 g
= 1300 ÷ 50
= 26
Cost for remaining 1300 g
= 26 x 0.60
= $15.60
Postage cost of the parcel with a mass of 1.9 kg
= 15.60 + 2.80
= $18.40
Answer(s): (a) $3.40 (b) $18.40