Question

plz help me.......... ​

Answer 1

Answer:

A ) 20 days is correct ..

Gave you solution in your previous question ..

if you wanna see other method :-

$\color{red}{Only\: for\: You}$ :-

1/(P+Q) - 1/P = 1/Q

1/10 - 1/20 = 1/Q

(2-1) /20 = 1/Q

1/20 = 1/Q

Q = 20 days (Ans.)

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