QuestionA rectangle has dimensions $10 \mathrm{~cm}$ by $8 \mathrm{~cm}$. If length increases by $60\%$, find width's percentage change if: (a) perimeter stays the same. (b) area stays the same.

Studdy Solution
Calculate the percentage change in width.
$$Percentage\, change\, in\, width = ((5 cm -8 cm) /8 cm) \times100\% = -37.5\%$$The width of the rectangle decreases by37.5% if the area remains unchanged.