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 1.9 kg?
(a)
Cost
= 3.70 + 0.40
= $4.10
(b)
1 kg = 1000 g
1.9 kg = 1.9 x 1000 = 1900 g
Cost for first 350 g = $3.70
Remaining mass
= 1900 - 350
= 1550 g
Number of sets of 100 g
= 1550 ÷ 100
= 15.5
Number of sets of 100 g to pay for
= 15 + 1
= 16
Cost for remaining 1550 g
= 16 x 0.40
= $6.40
Total cost
= 6.40 + 3.70
= $10.10
Answer(s): (a) $4.10; (b) $10.10