Question

The dimensions of a field are 15m and 12m. A 8m long 2.5m wide and 2m deep pit is dug in one corner of the field and earth removed from this pit is evenly spread over the remaining area of the field. Calculate by how much the level of the field is raised.

Answer 1

as the area of the feild =l×b =15×12
180 sq. m
now volume of pit = lbh
8×2.5×2 = 40 cu. m
area of the base of pi = lb
8×2.5 = 20 sq.m
now volume will spread on area =
180-120 = 150 sq. m
height of rised level =
150×h = 40
h = 40/150 = 0.2666 m or 26.66 cm (ans)