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 2.6 kg?
(a)
Cost
= 3.70 + 0.60
= $4.30
(b)
1 kg = 1000 g
2.6 kg = 2.6 x 1000 = 2600 g
Cost for first 550 g = $3.70
Remaining mass
= 2600 - 550
= 2050 g
Number of sets of 100 g
= 2050 ÷ 100
= 20.5
Number of sets of 100 g to pay for
= 20 + 1
= 21
Cost for remaining 2050 g
= 21 x 0.60
= $12.60
Total cost
= 12.60 + 3.70
= $16.30
Answer(s): (a) $4.30; (b) $16.30