The number, whose square is equal to the difference of the squares of 75.15 and 60.12, is = ?
A. 46.09
B. 48.09
C. 45.09
D. 47.09
Answer: Option C
Solution(By Examveda Team)
$$\eqalign{ & {\text{Let the number be = }}x \cr & {\text{According to question,}} \cr & {x^2} = {\left( {75.15} \right)^2} - {\left( {60.12} \right)^2} \cr & \Rightarrow {x^2} = {\left( {75.15 + 60.12} \right)}\,{\left( {75.15 - 60.12} \right)} \cr & \Rightarrow {x^2} = 135.27 \times 15.03 \cr & \Rightarrow {x^2} = 2033.1081 \cr & \Rightarrow x = 45.09 \cr} $$Related Questions on Simplification
A. 20
B. 80
C. 100
D. 200
E. None of these
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B. Rs. 3750
C. Rs. 3840
D. Rs. 3900
E. None of these
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