The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 450 g?
- How much is the postage if a parcel has a mass of 1.4 kg?
(a)
Cost
= 2.30 + 0.80
= $3.10
(b)
1 kg = 1000 g
1.4 kg = 1.4 x 1000 = 1400 g
Cost for first 350 g = $2.30
Remaining mass
= 1400 - 350
= 1050 g
Number of sets of 100 g
= 1050 ÷ 100
= 10.5
Number of sets of 100 g to pay for
= 10 + 1
= 11
Cost for remaining 1050 g
= 11 x 0.80
= $8.80
Total cost
= 8.80 + 2.30
= $11.10
Answer(s): (a) $3.10; (b) $11.10