48 persons can repair a road in 12 days, working 5 hours a day. in how many days will 30 persons, working 6 hours a day, complete the work?
Select:
A) 10  B) 16  C) 13  D) 18  E) 19
<gadget id="calculator">48 * 12</gadget>
<output>576</output>

<gadget id="calculator">576 * 5</gadget>
<output>2_880</output>

<gadget id="calculator">30 * 6</gadget>
<output>180</output>

<gadget id="calculator">2_880 / 180</gadget>
<output>16</output>

<result>B</result>
48 persons can repair a road in 12 days, working 5 hours a day. in how many days will 30 persons, working 6 hours a day, complete the work?
divide(multiply(multiply(48, 12), 5), multiply(30, 6))
"let the required number of days be x . less persons , more days ( indirect proportion ) more working hours per day , less days ( indirect proportion ) persons 30 : 48 : : 12 : x working hours / day 6 : 5 30 x 6 x x = 48 x 5 x 12 x = ( 48 x 5 x 12 ) / ( 30 x 6 ) x = 16 answer b"