Arushi spends Rs. X daily and saves Rs. Y per week. How much money she saves in XY2 weeks?
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Answer:
Given,
Amount spent by Aarushi in a day =Rs.x
Amount spent by Aarushi in a week =Rs.7x
Amount earned by Aarushi in a week =Rs.y.
Thus,
Amount saved by Aarushi in a week =Rs.y−7x
Amount saved by Aarushi in xy
2
weeks =Rs.(y−7x)xy
2
.