Question

length-8m5dm,breadth-6m8dm

Answer 1

perimeter of a rectangle is twice the sum of the length and breadth of the rectangle

so in this case the perimeter is
2 (85+68) dm
=2×153
=306 dm
=30 m 6 dm

Answer 2

Length = 8.5m
Breadth =6.8 m
Since, Perimeter of rectangle =2 (l+b)
=2 (8.5+6.8)
=2×15.3
=30.6M square.