Anna bought 3 kg of pineapples at $
r per kg and 5 kg of apples at $2
r per kg.
- Find the amount that she paid for the fruits in terms of r.
- If r = 7, how much change did Mrs Anna receive if she paid the fruit seller with a $100 note?
(a)
Amount paid for the pineapples
= 3 x
r = $3
r Amount paid for the apples
= 5 x 2
r = $10
r Total amount paid for the fruits
= 3
r + 10
r = $13
r (b)
Amount that Mrs Anna paid for the fruits
= 13
r = 13 x 7
= $91
Amount of change that Mrs Anna received
= 100 - 91
= $9
Answer(s): (a) $13
r ; (b) $9