The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 850 g?
- How much is the postage if a parcel has a mass of 2.8 kg?
(a)
Cost
= 2.05 + 0.60
= $2.65
(b)
1 kg = 1000 g
2.8 kg = 2.8 x 1000 = 2800 g
Cost for first 750 g = $2.05
Remaining mass
= 2800 - 750
= 2050 g
Number of sets of 100 g
= 2050 ÷ 100
= 20.5
Number of sets of 100 g to pay for
= 20 + 1
= 21
Cost for remaining 2050 g
= 21 x 0.60
= $12.60
Total cost
= 12.60 + 2.05
= $14.65
Answer(s): (a) $2.65; (b) $14.65