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The area of the square, one of whose dia...

The area of the square, one of whose diagonals is `3hat(i)+4hat(j)` is

A

12 square unit

B

12.5 square unit

C

25 square unit

D

156.25 square unit

Text Solution

Verified by Experts

The correct Answer is:
B
Length of diagonal
`=D=sqrt(3^(2)+4^(2))`
`rArr D=5`
`:.` Area `=(1)/(2)(D)^(2)=(25)/(2)`
`12.5` units
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