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62^(2)-32^(2)+(?)^(2)=3144...

`62^(2)-32^(2)+(?)^(2)=3144`

A

17

B

16

C

19

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`(62+32)(62-32)+?=3144`
`rArr 94xx30+?^(2)=3144`
`rArr 2820+?^(2)=3144`
`rArr ?^(2)=3144-2820=324`
`:. ?=sqrt(324)=18`
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