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 1.2 kg?
(a)
Cost
= 2.40 + 0.20
= $2.60
(b)
1 kg = 1000 g
1.2 kg = 1.2 x 1000 = 1200 g
Cost for first 850 g = $2.40
Remaining mass
= 1200 - 850
= 350 g
Number of sets of 100 g
= 350 ÷ 100
= 3.5
Number of sets of 100 g to pay for
= 3 + 1
= 4
Cost for remaining 350 g
= 4 x 0.20
= $0.80
Total cost
= 0.80 + 2.40
= $3.20
Answer(s): (a) $2.60; (b) $3.20