Question

the four semicircular grass plots shaded and to be turfed at ₹20.50 per sq.m. if the side of square abcd is 10m,then calculate the cost of turfing.

Answer 1

area of square=10×10=100 and cost be =100×20.50=2050 rupees required for turfing

Answer 2

The cost of turfing = 3221 Rs

Step-by-step explanation:

Given that Side of square =  10 m

Diameter of semicircular glass = 10 m

Therefore , the radius = 10/2 = 5 m

Area of four semicircles  =  4 × $\frac{1}{2}$ πr²

                                        = 2πr²

                                        = 2 × 22/7 x (5)²

                                        =  157.14 cm²

The cost of turfing the plot at Rs 20.50 sq m = 157.14 x 20.50

                                                                          = 3221 Rs