Subject
Bank Exam
Topic
Pubali Bank Ltd. Senior Officer 2014
The length of a rectangle is twice its breadth, If its length is decreased by 5 cm and breadth is increased by 5 cm, the area of the rectangle is increased by 75 sq. cm. Find the length of the rectangle?
The length of a rectangle is twice its breadth, If its length is decreased by 5 cm and breadth is increased by 5 cm, the area of the rectangle is increased by 75 sq. cm. Find the length of the rectangle?
ক)
20cmখ)
26cmগ)
30cmঘ)
35 cmExplanation
Suppose, Breadth is x cm; length will be 2x cm so area = 2x2 If its length is decreased by 5 cm it will be 2x-5 and breadth is increased by 5 cm it will be x+5 New area will be (2x-5)(x+5) =2x2+ 10x - 5x - 25= 2x2+ 5x -25 So, 2x2+ 5x - 2x2 = 75 5x = 75 x = 13 Length is 26cmRelated questions
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