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 2.2 kg?
(a)
Cost
= 3.00 + 0.50
= $3.50
(b)
1 kg = 1000 g
2.2 kg = 2.2 x 1000 = 2200 g
Cost for first 550 g = $3.00
Remaining mass
= 2200 - 550
= 1650 g
Number of sets of 100 g
= 1650 ÷ 100
= 16.5
Number of sets of 100 g to pay for
= 16 + 1
= 17
Cost for remaining 1650 g
= 17 x 0.50
= $8.50
Total cost
= 8.50 + 3.00
= $11.50
Answer(s): (a) $3.50; (b) $11.50