A sum of money is sufficient to pay A's wages for 20 days and B's wages for 30 days. The same money is sufficient to pay the wages of both for?	Select:
A) 12days	B) 15days	C) 20days	D) 18days	E) 22days
Let the total money be $x   12days's 1day work = $ x/20   B's 1day work = $ x/30   12days+B 1day work = $ x/12   Money is sufficient to pay the wages of both for 12days   12daysnswer is 12days
<result>A</result>
A sum of money is sufficient to pay A's wages for 20 days and B's wages for 30 days. The same money is sufficient to pay the wages of both for?