Question

ffind find the perimeter and area of the following rectangles whose length and breadth of given below 7 cm 8 cm

Answer 1

is sin i/sin r = u1/u2 or sin i/sin r = u2/u1. please tell me

Answer 2

perimeter of rectangle =2 (l+b)
=2 (7+8)
=30 cm
and area of rectangle =lb
=7cm ×8cm

$= {56cm}^{2}$