Question

A and B together can do a piece of work in 7 days if A alone does twice as much work as B in a work in a given time find how long A alone would take to the work work ?​

Answer 1

Answer: 14 days

Step-by-step explanation:

Let work of A = x, and B = y:-

As per the question,

Equations are:-

x + y = 7 ... (1), and

2x = y -7 ... (2)

In (2):-

2x + y = -7

SUBTRACTING (1) by (2):-

(2x + y ) - (x + y) = 7 - (-7)

Thus, x = 14

Thus A takes 14 days