Answers

2014-11-23T19:40:15+05:30
Area of rectangle = L * B
                         = 4x * 3y
                         = 12xy

Hence option 2 is correct. 
0
2014-11-23T19:46:45+05:30
It is 12xy. because area of a rectangle is lb so 4x(3y) = 12xy.
0