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 2.3 kg?
(a)
Postage cost of the parcel with a mass of 750 g
= 3.70 + 0.90
= $4.60
(b)
1 kg = 1000 g
2.3 kg = 2.3 x 1000 = 2300 g
Cost for first 700 g = $3.70
Remaining mass
= 2300 - 700
= 1600 g
Number of sets of 50 g
= 1600 ÷ 50
= 32
Cost for remaining 1600 g
= 32 x 0.90
= $28.80
Postage cost of the parcel with a mass of 2.3 kg
= 28.80 + 3.70
= $32.50
Answer(s): (a) $4.60 (b) $32.50