The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 950 g?
- How much is the postage if a parcel has a mass of 1.3 kg?
(a)
Cost
= 40 + 0.70
= $40.70
(b)
1 kg = 1000 g
1.3 kg = 1.3 x 1000 = 1300 g
Cost for first 850 g = $40
Remaining mass
= 1300 - 850
= 450 g
Number of sets of 100 g
= 450 ÷ 100
= 4.5
Number of sets of 100 g to pay for
= 4 + 1
= 5
Cost for remaining 450 g
= 5 x 0.70
= $3.50
Total cost
= 3.50 + 40
= $43.50
Answer(s): (a) $40.70; (b) $43.50