a can do a piece of work 30 days. b can do work in 45 days. in how many days they will complete the work together?	Choose the correct choice from the following answers.
A) 15 days	B) 16 days	C) 19 days	D) 17 days	E) 18 days
<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / 45</gadget>
<output>1/45 = around 0.022222</output>

<gadget id="calculator">(1/30) + (1/45)</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">1 / (1/18)</gadget>
<output>18</output>

<result>E</result>
a can do a piece of work 30 days. b can do work in 45 days. in how many days they will complete the work together?
divide(const_1, add(divide(const_1, 30), divide(const_1, 45)))
"lcm = 90 , ratio = 30 : 45 = 2 : 3 no of days = 90 / ( 2 + 3 ) = 90 / 5 = 18 days answer : e"