A ring shaped tube contain two ideal gases with equal masses and relative molar masses `M_1=32 and M_2=28.`
The gases are separated by one fixed partiotin and another movable stopper S which can move freely without friction inside the ring. The angle `alpha` as shown in the figure is ...... degrees.
A. `(7pi)/(8)`
B. `(8pi)/(7)`
C. `(15pi)/(16)`
D. `(16pi)/(15)`