If Ram and gohul can do a job in 10 days and 15 days independently, How many days would they take to complete the same job working simultaneously?	Choose one
A) 10 B) 5 C) 8 D) 6 E) 13
If total work is X.   Ram working rate=X/10 per day.   Working rate of gohul=X/15 per day.   Rate of work=(X/10)+(X+15)=30X/5X=6 days   The answer is option 630 /5= 
<gadget id="calculator">30 /5</gadget>
<output>6</output>
6 days   The answer is option 6
<result>D</result>
If Ram and gohul can do a job in 10 days and 15 days independently, How many days would they take to complete the same job working simultaneously?