The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 650 g?
- How much is the postage if a parcel has a mass of 1.9 kg?
(a)
Cost
= 2.40 + 0.70
= $3.10
(b)
1 kg = 1000 g
1.9 kg = 1.9 x 1000 = 1900 g
Cost for first 550 g = $2.40
Remaining mass
= 1900 - 550
= 1350 g
Number of sets of 100 g
= 1350 ÷ 100
= 13.5
Number of sets of 100 g to pay for
= 13 + 1
= 14
Cost for remaining 1350 g
= 14 x 0.70
= $9.80
Total cost
= 9.80 + 2.40
= $12.20
Answer(s): (a) $3.10; (b) $12.20