The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 750 g?
- How much is the postage if a parcel has a mass of 2.5 kg?
(a)
Postage cost of the parcel with a mass of 750 g
= 2.50 + 0.60
= $3.10
(b)
1 kg = 1000 g
2.5 kg = 2.5 x 1000 = 2500 g
Cost for first 700 g = $2.50
Remaining mass
= 2500 - 700
= 1800 g
Number of sets of 50 g
= 1800 ÷ 50
= 36
Cost for remaining 1800 g
= 36 x 0.60
= $21.60
Postage cost of the parcel with a mass of 2.5 kg
= 21.60 + 2.50
= $24.10
Answer(s): (a) $3.10 (b) $24.10