A person decided to build a house in 100days. He employed 100men in the beginning and 100 more after 10 days and completed the construction in stipulated time. If he had not employed the additional men , how many days behind schedule would it have been finished?  Choose the most appropriate option:
A) 40	B) 80	C) 70	D) 60	E) 90
200 men do the rest of the work in   100-10= 
<gadget id="calculator">  100-10</gadget>
<output>90</output>
90days   100 men can do the rest of the work in 90*200/100= 
<gadget id="calculator">90*200/100</gadget>
<output>180</output>
180 days   Required number of days= 180-90= 
<gadget id="calculator">180-90</gadget>
<output>90</output>
90 days   Answer is 90
<result>E</result>
A person decided to build a house in 100days. He employed 100men in the beginning and 100 more after 10 days and completed the construction in stipulated time. If he had not employed the additional men , how many days behind schedule would it have been finished?