In $\odot( O ,\, r),$ minor $\widehat{ ABC }$ subtends a right angle at the centre. The area of the minor segment formed by $\widehat{ ABC }$ is $14.25\,cm ^{2}$ and the area of $\Delta OAC$ is $25 \,cm ^{2}$. Then, the area of the minor sector formed by $\widehat{ ABC }$ is $\ldots \ldots \ldots cm ^{2}$.
In $\odot( O ,\, r),$ minor $\widehat{ ABC }$ subtends a right angle at the centre. The area of the minor segment formed by $\widehat{ ABC }$ is $14.25\,cm ^{2}$ and the area of $\Delta OAC$ is $25 \,cm ^{2}$. Then, the area of the minor sector formed by $\widehat{ ABC }$ is $\ldots \ldots \ldots cm ^{2}$.
- A
$39.25$
- B
$28.50$
- C
$10.75$
- D
$42.75$
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