$A$ balloon and its content having mass $M$ is moving up with an acceleration $a$. The mass that must be released from the content so that the balloon starts moving up with an acceleration $3a$ will be: (Take $g$ as acceleration due to gravity)
- A$\frac{3Ma}{2a-g}$
- B$\frac{3Ma}{2a+g}$
- C$\frac{2Ma}{3a+g}$
- D$\frac{2Ma}{3a-g}$
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