Question

There is sufficient salary to give K for 10 days and L for 15 days. Then how many days will the money last if both has to be given the salary ?
A) 6 days
B) 12 days
C) 4 days
D) 9 days

Answer 1

Hey.


Here is the answer.


For K salary is sufficient for 10 days.


so, for 1 day K needs 1/10 of salary


For L it is sufficient for 15 days


so, for 1 day L needs 1/15 of salary.


Together for 1 day they will need


1/10 + 1/15 = (15+10)/15×10

= 25/150 salary


= 1/6 Salary


Since in one day they need 1/6th of the salary


so, they together will use the salary in 6 days .



So, 6 days the money will last if both has to be given the salary.


Answer : (A) 6 days


Thanks

Answer 2

Heya....

==== Answer ====

Option A , 6 days is the answer....

_______ Solution ______

For K salary 10 days are sufficient
For 1 day = 1/10 of salary

For L salary 15 days are sufficient
For 1 day = 1/15 of salary

Together they needed the days ...

1/10+1/15 = (15+10)/(15*10)

25/150 = 1/6

So... 6 days together they needed...

Thank you