One room length is 16 m and breadth 12m.outside this room there is corridor 3.5 m wide.in this corridor how much stone will be used of size 7 decimeter× 5 decimeter?
Choose the correct choice from the following
A) 600	B) 700	C) 800	D) 900	E) 400
Area of room = (16*12) sq.m= 192 sq.m   Area of room along with corridor=[(16+2*3.5)×(12+2*3.5)] sq.m=(23×19)=437 sq.m.   Area of corridor=[437-192= 
<gadget id="calculator">437-192</gadget>
<output>245</output>
245 sq.m   Area of one stone=[7/10*5/10]=7/20sq.m   No. of stone=245×20/7=700   Answer 700
<result>B</result>
One room length is 16 m and breadth 12m.outside this room there is corridor 3.5 m wide.in this corridor how much stone will be used of size 7 decimeter× 5 decimeter?