Question

5. A, B and C can polish the floor together in 4 days. B alone can polish it in 10 days and C alone can polish
it in 12 days. In how many days will A do this work alone?​

Answer 1

Answer:

A and B can polish the floors in 20 days.

So, in 1 day, they can polish 1/20 of the number of floors.

B can do 1/4 of it in 12 days.

In 1 day B can do 1/48 of it in 1 day.

So, A can do 1/20 - 1/48 = 7/240 of the work.

A alone can finish the whole work in 240/7 = 34 2/7 days.

PLEASE MARK ME AS BRAINLLIEST AND VOTE ME

Answer 2

Answer:

A can do this work in 15 days.