Subject: General Aptitude · Chapter: Area · Exam: · Marks: · Difficulty:
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.
Answer
Answer (as printed):
Explanation
Let breadth = x. Then, length = 2x. Then, (2x – 5) (x + 5) – 2x × x = 75 ⇔ 5x – 25 = 75 ⇔ x = 20. ∴ Length of the rectangle = 20 cm.
Explanation as extracted from the printed page; notation may be imperfect.