A radioactive element X has a half-life of 30 hours. It decays via alpha, beta and gamma emissions with the branching ratio for beta decay being 0.75. The partial half-life for beta decay in unit of hours is

A radioactive element X has a half-life of 30 hours. It decays via alpha, beta and gamma emissions with the branching ratio for beta decay being 0.75. The partial half-life for beta decay in unit of hours is

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Question

A radioactive element X has a half-life of 30 hours. It decays via alpha, beta and
gamma emissions with the branching ratio for beta decay being 0.75. The partial half-life
for beta decay in unit of hours is

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