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Question

Cube of 45 is


A

37125

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B

37005

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C

90005

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D

91125

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Solution

The correct option is D

91125


(45)3 = (40 + 5)3 = (40)3 + 53 + 3 40 5 (40 + 5)

= 64000 + 125 + 600(45)

= 64125 + 27000 = 91125


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