Find the x coordinate of the centre of mass of the bricks shown in figure :

Options

A. `(24)/(25)l`
B. `(25)/(24)l`
C. `(15)/(16)l`
D. `(16)/(15)l`

Answer

B

Explanation

Ans.(2)
`X_(cm)=(m((t)/(2))+m((t)/(2)+(t)/(2))+m((t)/(2)+(t)/(4)+(t)/(2))+m((t)/(2)+(t)/(4)+(t)/(6)+(t)/(2)))/(m+m+m+m)`
`=(25)/(24)l`