The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 750 g?
- How much is the postage if a parcel has a mass of 1.4 kg?
(a)
Cost
= 3.20 + 0.40
= $3.60
(b)
1 kg = 1000 g
1.4 kg = 1.4 x 1000 = 1400 g
Cost for first 650 g = $3.20
Remaining mass
= 1400 - 650
= 750 g
Number of sets of 100 g
= 750 ÷ 100
= 7.5
Number of sets of 100 g to pay for
= 7 + 1
= 8
Cost for remaining 750 g
= 8 x 0.40
= $3.20
Total cost
= 3.20 + 3.20
= $6.40
Answer(s): (a) $3.60; (b) $6.40