A and B can do a work in 5 days and 10 days respectively. A starts the work and B joins him after 2 days. In how many days can they complete the remaining work?  Choose the correct answer
A) 6	B) 2	C) 3	D) 4	E) 98
Work done by A in 2 days = 2/5   Remaining work = 3/5   Work done by both A and 2 in one day = 1/5 + 1/10 = 3/10   Remaining work = 3/5 * 10/3= 
<gadget id="calculator">3/5 * 10/3</gadget>
<output>2</output>
2 day   Answer: 2
<result>B</result>
A and B can do a work in 5 days and 10 days respectively. A starts the work and B joins him after 2 days. In how many days can they complete the remaining work?