Question

A aur B don't milakar kiss Kam ko 10 din me karate h to B us Kam ko kitane din me karega

Answer 1

Let B can alone finish the work = x days

So, A can alone finish the work = (x- 10) days

Now, one day work of A = 1/(x- 10)

and one day work of B = 1/x

Now, given, (A + B) can finish the ork = 10 days

So, one day work of (A + B) = 1/10

=> one day work of A + one day work of B = 1/10

=> 1/(x - 10) + 1/x = 1/10

=> (x + x - 10)/{x*(x - 10)} = 1/10

=> (2x - 10)/{x2 - 10x)} = 1/10

=> 10(2x - 10) = x2 - 10x

=> 20x - 100 = x2 - 10x

=> x2 - 10x - 20x + 100 = 0

=> x2 - 30x + 100 = 0

HOPE THIS HELPS YOU