john and andrew can finish the work 9 days if they work together. they worked together for 6 days and then andrew left. john finished the remaining work in another 6 days. in how many days john alone can finish the work? Choose the correct choice from the following options:
A) 30 days B) 60 days C) 18 days D) 80 days E) 90 days
<gadget id="calculator">6 / 9</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 / (1/3)</gadget>
<output>18</output>

<result>C</result>
john and andrew can finish the work 9 days if they work together. they worked together for 6 days and then andrew left. john finished the remaining work in another 6 days. in how many days john alone can finish the work?
divide(6, subtract(const_1, divide(6, 9)))
amount of work done by john and andrew in 1 day = 1 / 9 amount of work done by john and andrew in 6 days = 6 ã — ( 1 / 9 ) = 2 / 3 remaining work â € “ 1 â € “ 2 / 3 = 1 / 3 john completes 1 / 3 work in 6 days amount of work john can do in 1 day = ( 1 / 3 ) / 6 = 1 / 18 = > john can complete the work in 18 days answer : c