Question

a take 6days less then the time taken by b to finish a piece of work if both worked together can finish it in 4 days then find the time taken if b worked alone

Answer 1

a=b-6
so a-b = -6...... (1)
a+b=4...... (2)
(1)+(2) .....
2a=2
i.e.,
a=1
from (2)
a+b=4
so 1+b=4
b=4-1 =3