Xuan saved some of her school pocket money for 4 days. She saved $10 on the first day. For the remaining 3 days, she saved $0.20 more than the previous day.
- How much money did she save in 4 days?
- Xuan then spent all her savings on 2 identical files. How much did each file cost?
(a)
Amount that Xuan saved on the first day = $10
Amount that Xuan saved on the second day = $10 + $0.20
Amount that Xuan saved on the third day = $10 + $0.20 + $0.20
Amount that Xuan saved on the fourth day = $10 + $0.20 + $0.20 + $0.20
Total amount the Xuan saved in 4 days
= 4 x 10 + 6 x 0.20
= 40 + 1.20
= $41.20
(b)
Cost of each file
= 41.20 ÷ 2
= $20.60
Answer(s): (a) $41.20; (b) $20.60