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Question 136
if $$78^{2}$$ is subtracted from the square of a number, the obtained answer is 6460. What is that number?
Solution
Let the number be $$x$$
According to ques,
=> $$x^2-78^2=6460$$
=> $$x^2=6460+6084$$
=> $$x=\sqrt{12544}=112$$
=> Ans - (E)
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