10 Questions 10 Marks 8 Mins
Given: One side of the square increased = 30% Formula used: Area of square = a2 Calculation: Let each side of the square be a According to the question New side of the square = (130a/100) ⇒ 13a/10 New area of the square = (13a/10)2 ⇒ (169a2/100) Increased area = (169a2/100 – a2) ⇒ (169a2 – 100a2)/100 ⇒ 69/100 Increased percentage = (69/100 × 100) ⇒ 69% ∴ The required percentage increase in area is 69%
Here change in sides is 30% ⇒ change in the area = 30 + 30 + (30)2/100 ⇒ 60 + 900/100 = 69 ∴ The required percentage increase in area is 69% India’s #1 Learning Platform Start Complete Exam Preparation
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