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Question : Let A be the area of a square whose each side is 10 cm. Let B be the area of a square whose diagonals are 14 cm each. Then (A – B) is equal to:

Option 1: 0

Option 2: 1

Option 3: 2

Option 4: 4


Team Careers360 1st Jan, 2024
Answer (1)
Team Careers360 9th Jan, 2024

Correct Answer: 2


Solution : Given: Let A be the area of a square whose each side is 10 cm. Let B be the area of a square whose diagonals are 14 cm each.
Area of the first square, A = (10) 2 = 100 cm 2
Each side of the second square = $\frac{14}{\sqrt2}$ = $7\sqrt2$ cm
So, the area of the second square, B = $(7\sqrt2)^2$ = 98 cm 2
Now, (A – B) = (100 – 98) = 2 cm 2
Hence, the correct answer is 2.

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