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 1.4 kg?
(a)
Cost
= 3.60 + 0.80
= $4.40
(b)
1 kg = 1000 g
1.4 kg = 1.4 x 1000 = 1400 g
Cost for first 750 g = $3.60
Remaining mass
= 1400 - 750
= 650 g
Number of sets of 100 g
= 650 ÷ 100
= 6.5
Number of sets of 100 g to pay for
= 6 + 1
= 7
Cost for remaining 650 g
= 7 x 0.80
= $5.60
Total cost
= 5.60 + 3.60
= $9.20
Answer(s): (a) $4.40; (b) $9.20