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 1.4 kg?
(a)
Cost
= 2.30 + 0.40
= $2.70
(b)
1 kg = 1000 g
1.4 kg = 1.4 x 1000 = 1400 g
Cost for first 850 g = $2.30
Remaining mass
= 1400 - 850
= 550 g
Number of sets of 100 g
= 550 ÷ 100
= 5.5
Number of sets of 100 g to pay for
= 5 + 1
= 6
Cost for remaining 550 g
= 6 x 0.40
= $2.40
Total cost
= 2.40 + 2.30
= $4.70
Answer(s): (a) $2.70; (b) $4.70