A homogeneous plate PQRST is as shown in figure. The centre of mass of plate lies at midpoint A if segment QT. Then the ratio of (b)/(a) is (PQ = PT = b , QR = RS = ST = a) .

A homogeneous plate PQRST is as shown in figure. The centre of mass of

1.	A homogeneous plate PQRST is as shown in figure. The centre of mass of plate lies at midpoint A if segment QT. Then the ratio of (b)/(a) is (PQ = PT = b , QR = RS = ST = a) .
Answer» `(13)/(4)` `(13)/(2)` `sqrt((13)/(2))` `sqrt((13)/(4))` Solution :(d) If CENTRE of mass is at `A` `a^2 SIGMA (a)/(2) = sigma (1)/(2) ab SIN theta (1)/(3) b sin theta` or `(b)/(a) = sqrt((13)/(4))` .