The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 500 g?
- How much is the postage if a parcel has a mass of 1.5 kg?
(a)
Postage cost of the parcel with a mass of 500 g
= 3.00 + 0.70
= $3.70
(b)
1 kg = 1000 g
1.5 kg = 1.5 x 1000 = 1500 g
Cost for first 400 g = $3.00
Remaining mass
= 1500 - 400
= 1100 g
Number of sets of 100 g
= 1100 ÷ 100
= 11
Cost for remaining 1100 g
= 11 x 0.70
= $7.70
Postage cost of the parcel with a mass of 1.5 kg
= 7.70 + 3.00
= $10.70
Answer(s): (a) $3.70 (b) $10.70