A square carpet with an area 169 m2 must have 2 metres cut-off one of its edges in order to be a perfect fit for a rectangular room. What is the area of rectangular room?  Choices
A) 180 m2 B) 164 m2 C) 152 m2 D) 143 m2 E) None of these
Side of square carpet = √Area=√169=13m   After cutting of one side,   Measure of one side = 13 – 2 = 11 m   and other side = 13 m (remain same)   ∴ Area of rectangular room = 13 × 11 = 143 m2   Answer 143 m2
<result>D</result>
A square carpet with an area 169 m2 must have 2 metres cut-off one of its edges in order to be a perfect fit for a rectangular room. What is the area of rectangular room?