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 1.7 kg?
(a)
Postage cost of the parcel with a mass of 600 g
= 3.90 + 0.30
= $4.20
(b)
1 kg = 1000 g
1.7 kg = 1.7 x 1000 = 1700 g
Cost for first 550 g = $3.90
Remaining mass
= 1700 - 550
= 1150 g
Number of sets of 50 g
= 1150 ÷ 50
= 23
Cost for remaining 1150 g
= 23 x 0.30
= $6.90
Postage cost of the parcel with a mass of 1.7 kg
= 6.90 + 3.90
= $10.80
Answer(s): (a) $4.20 (b) $10.80