Renu can do a piece of work in 6 days, but with the help of her friend Suma , she can do it in 5 days. In what time Suma can do it alone?	Choose the correct choice.
A) 10	B) 12	C) 14	D) 15	E) 30
Renuâ€™s one dayâ€™s work = 1/6   Sumaâ€™s one dayâ€™s work = 1/5 - 1/6 = 1/30   Suma can do it alone in 30 days.   ANSW30R:30
<result>E</result>
Renu can do a piece of work in 6 days, but with the help of her friend Suma , she can do it in 5 days. In what time Suma can do it alone?