5. Mr. Sharma had a triangular plot of land having length of edges 40 m, 30.5m and 48.5 m 1,What is the perimeter of his plot? 2,If he constructed a circular pond of radius 7 m inside the plot, find the circumference of the pond. 3,If he built a cuboidal house on his plot with length 20 m., width 18 m. and height 25 m, what is the volume of his house? 4, If one of the rooms of his house is 10 m long, 6 m wide and 4 m high, calculate the surface area of the room.