x does a work in 20 days. y does the same work in 30 days. in how many days they together will do the same work? Pick one
A) 10 B) 12 C) 20 D) 30 E) 15
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/20) + (1/30)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / (1/12)</gadget>
<output>12</output>

<result>B</result>
x does a work in 20 days. y does the same work in 30 days. in how many days they together will do the same work?
inverse(add(divide(const_1, 20), divide(const_1, 30)))
"x ' s 1 day ' s work = 1 / 20 y ' s 1 day ' s work = 1 / 30 ( x + y ) ' s 1 day ' s work = ( 1 / 20 + 1 / 30 ) = 1 / 12 both together will finish the work in 12 days . correct option is b"