a and b can together finish a work in 40 days. they worked together for 10 days and then b left. after another 18 days, a finished the remaining work. in how many days a alone can finish the job? Pick one:
A) 10 B) 24 C) 60 D) 30 E) 20
<gadget id="calculator">18 * 40</gadget>
<output>720</output>

<gadget id="calculator">40 - 10</gadget>
<output>30</output>

<gadget id="calculator">720 / 30</gadget>
<output>24</output>

<result>B</result>
a and b can together finish a work in 40 days. they worked together for 10 days and then b left. after another 18 days, a finished the remaining work. in how many days a alone can finish the job?
divide(multiply(18, 40), subtract(40, 10))
a + b 10 days work = 10 * 1 / 40 = 1 / 4 remaining work = 1 - 1 / 4 = 3 / 4 3 / 4 work is done by a in 18 days whole work will be done by a in 18 * 4 / 3 = 24 days answer is b