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
= 3.50 + 0.70
= $4.20
(b)
1 kg = 1000 g
1.4 kg = 1.4 x 1000 = 1400 g
Cost for first 750 g = $3.50
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 0.70
= $4.90
Total cost
= 4.90 + 3.50
= $8.40
Answer(s): (a) $4.20; (b) $8.40