Question

6. A and B separately do a work in 10 and 15 days respectively. They worked together for
some days and then A completed the remaining work in 5 days. For how many days
had A and B worked together?
IF 3 Yaromen or 5 cirle toko 17 do to​

Answer 1

Answer:

3 days.

Step-by-step explanation:

Amount of work A can do in 1 day = 1/10

Amount of work B can do in 1 day = 1/15

Amount of work both can do in 1 day = 1/10 + 1/15 = 3/30 + 2/30 = 5/30 = 1/6

Let us say that both worked together for x days.

Then,

x/6 + 5/10 = 1

x/6 + 1/2 = 1

x/6 = 1/2

x = 1/2 × 6 = 3

Both worked together for 3 days.