The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 600 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 600 g
= 2.00 + 0.30
= $2.30
(b)
1 kg = 1000 g
1.5 kg = 1.5 x 1000 = 1500 g
Cost for first 550 g = $2.00
Remaining mass
= 1500 - 550
= 950 g
Number of sets of 50 g
= 950 ÷ 50
= 19
Cost for remaining 950 g
= 19 x 0.30
= $5.70
Postage cost of the parcel with a mass of 1.5 kg
= 5.70 + 2.00
= $7.70
Answer(s): (a) $2.30 (b) $7.70