Question

4. Find the breadth and perimeter of the rectangle if its area is 96 cm2 and the length is 12 cm.
5. The perimeter of a square courtyard is 144 m. Find the cost of cementing it at the rate of? 15 per m2.
6. The sides of a rectangle are in the ratio 4 : 5 and its perimeter is 90 cm. Find:​

Answer 1

Answer:

area=96

length=12

breadth=96/12=8

perimeter=2(8+12)=40

Answer 2

Answer:

4. B = A/L

      = 96 $cm^{2}$/12 cm

      = 8 cm

P = 2(L+B)

  = 2(12 cm + 8 cm)

  = 2*20 cm

  = 40 cm

5. S of square = 144/4 = 36

A of square = $S^{2}$

                    = $36^{2}$

                    = 1296 $cm^{2}$

Cost = 1296 $cm^{2}$/15 per $m^{2}$

        = 86.4 rupees

Step-by-step explanation: