a2zinterviews

17.	The length of a room is 5.5 m and width is 3.75 m. Find the cost of paying the floor by slabs at the rate of Rs. 800 per sq.metre.
	A.  Rs. 15,000
	B.  Rs. 15,500
	C.  Rs. 15,600
	D.  Rs. 16,500

Solution

Area of the floor = (5.5 x 3.75)m² = 20.635m ² Cost of paying = Rs. (800 x 20.625) = Rs.16500.

18.	If a square and a rhombus stand on the same base, then the ratio of the areas of the square and the rhombus is
	A.  greater than 1
	B.  equal to 1 / 2
	C.  equal to 1
	D.  equal to 1 / 4

Solution

A square and a rhombus on the same base are equal in area.

19.	If in a triangle, the area is numerically equal to the perimeter, then the radius of the inscribed circle of the triangle is
	A.  1
	B.  2
	C.  3
	D.  4

Solution

Radius = Area / Semi perimeter = [Area x 2 / Area] = 2.