If (64)2 - (36)2 = 20 x x, then x = ?
70
120
180
140
None of these
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Answer : Option D
Explanation :
20 x x = (64 + 36)(64 - 36) = 100 x 28
x =\( \frac { 100*28 } { 20 }\)=140
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x =\( \frac { 100*28 } { 20 }\)=140
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