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If (3)^2 @ 1 * 7 = 98 and (4)^2 @ 2 * 16...

If `(3)^2` @ 1 * 7 = 98 and `(4)^2` @ 2 * 16 = 178, then `(5)^2` @ 3 * 9=?

A

218

B

262

C

253

D

259

Text Solution

Verified by Experts

The correct Answer is:
B
`(3)^2` @ 1 * 7 =98
`rArr (3)^2 xx 10 + 1 + 7 =98`
`rArr` 90 + 8 = 98
`(4)^2` @ 2 * 16 = 178
`rArr (4)^2 ` x 10 + 2 + 16 = 178
`rArr` 160 + 18 = 178
Therefore ,
`(5)^2` @ 3 * 9 = ?
`rArr (5)^2` x 10 + 3 + 9
`rArr` 250 + 12 = 262 .
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