Answer:
a). 9 weeks
b). 4 more weeks
Explanation:
a). The cost of a new bicycle = $155.75
The amount I have with me = is $30
Therefore remaining amount = 155.75 - 30 = $ 125.75
The amount I will save in one week = is $ 5
The amount my aunt will give me one week = is $ 10
Therefore total amount I will save in one week = is 5 + 10= $ 15 in one week
Therefore the number of weeks required to collect the remaining amount of $125.75 is = 125.75 / 15 = 8.38 weeks
= 9 weeks
Thus 9 weeks are required to save money to buy a bicycle that costs $155.75
b). New cost of the bicycle = $ 203.89
From above at the end of 9 weeks, I will have = $ 125.75
The amount I have with me before = $ 30
Therefore by the end of 9 weeks, I have a total amount = of 125.75 + 30= $ 155.75
Therefore amount less = 203.89 - 155.75 = $ 48.14
The number of weeks required to collect the remaining amount of $ 48.14 by saving $ 15 in one week is = 48.14 / 15= 3.20 week
= 4 weeks
Thus, 4 more weeks are required to save money to buy a new bicycle that costs $ 203.89