Question

Tina is 50% more efficient than Rina, and Mina is 30% more efficient than Tina. If Mina and Tina together can do a piece of work in 12 days, in how many days will Rina complete the same work alone?

A 47.6 days
B 29.6 days
C 45.6 days
D 41.4 days
E None of these
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