Question 136
If $$(78)^{2}$$ is subtracted from the square of the number, the answer so obtained is 6,460. What is the number ?
Solution
Let the number be $$x$$
Acc to ques,
=> $$x^2 - 78^2 = 6460$$
=> $$x^2 = 6460 + 6084$$
=> $$x = \sqrt{12544} = 112$$
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