the dimensions of a field are 16.5 m by 10 m . a pit 10 m long , 5.5 m wide and 4 m deep is dug in one corner of the field and the earth removed has been evenly spread over the remaining area of the field . what will be the rise in the height of field as a result of this operation ?
"the volume of the earth removed is 10 * 5.5 * 4 = 220 m ^ 3 . the remaining area of the field is 16.5 * 10 - 10 * 5.5 = 110 m ^ 2 . 220 m ^ 3 of the earth evenly spread over the area of 110 m ^ 2 will rise the height by ( height ) = ( volume ) / ( area ) = 220 / 110 = 2 m . answer : a"
divide(multiply(10, 10), subtract(rectangle_area(16.5, 10), rectangle_area(5.5, 10)))