Pls clarify Radha and 9man tail in "Na 9 man tail hoga na radha Nachegi

Question

Why the author of idioms has used 9 man tail and which Radha is referred

Answer 1

a girl called radha did not know dancing but claimed she was a good dancer. when she was required to dance, she made demand for nine moindas of oil. it was a very difficult demand and could not be complied with. thus she concealed he ignorance of skill. from this, the proverb is derived.