The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 550 g?
- How much is the postage if a parcel has a mass of 1.6 kg?
(a)
Cost
= 2.00 + 0.80
= $2.80
(b)
1 kg = 1000 g
1.6 kg = 1.6 x 1000 = 1600 g
Cost for first 450 g = $2.00
Remaining mass
= 1600 - 450
= 1150 g
Number of sets of 100 g
= 1150 ÷ 100
= 11.5
Number of sets of 100 g to pay for
= 11 + 1
= 12
Cost for remaining 1150 g
= 12 x 0.80
= $9.60
Total cost
= 9.60 + 2.00
= $11.60
Answer(s): (a) $2.80; (b) $11.60