10 men can complete a work in 7 days. but 10 women need 14 days to complete the same work. how many days will 5 men and 10 women need to complete the work?	Answers:
A) 5 B) 6 C) 7 D) 8 E) 10
<gadget id="calculator">14 * 10</gadget>
<output>140</output>

<gadget id="calculator">1 / 140</gadget>
<output>1/140 = around 0.007143</output>

<gadget id="calculator">10 * (1/140)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/7) / 10</gadget>
<output>1/70 = around 0.014286</output>

<gadget id="calculator">5 * (1/70)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">(1/14) + (1/14)</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / (1/7)</gadget>
<output>7</output>

<result>C</result>
10 men can complete a work in 7 days. but 10 women need 14 days to complete the same work. how many days will 5 men and 10 women need to complete the work?
inverse(add(multiply(10, inverse(multiply(14, 10))), multiply(5, divide(inverse(7), 10))))
work done by 10 men in 1 day = 1 / 7 work done by 1 man in 1 day = ( 1 / 7 ) / 10 = 1 / 70 work done by 10 women in 1 day = 1 / 14 work done by 1 woman in 1 day = 1 / 140 work done by 5 men and 10 women in 1 day = 5 × ( 1 / 70 ) + 10 × ( 1 / 140 ) = 5 / 70 + 10 / 140 = 1 / 7 = 5 men and 10 women can complete the work in 7 days answer : option c