Question

A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do the work in​

Answer 1

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First line clearly states that efficiency of A should be equal to combined efficiency of B and C.(A take same time as B and C together)

Total efiiciency = 6

Efiiciency of C = 1 unit/day

Efficiency of A + B = 5 unit/day

So,what should be efficiency of B so that A's efficiency becomes equal to B and C's efficiency.

$= \frac{50}{2} = 25 \: Days$

$\Huge \boxed{ \colorbox{lime}{hope \: this \: helps}}$