Question

the floor of rectangular hall has a perimeter 250 its height is 5 M find the cost of painting its four walls including door Windows etc the rate of rupees 8 per square metre​

Answer 1

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Height of rectangular =6m

Perimeter =250m

We know that Perimeter of rectangle=2(l+b) 250=2(l+b)

Area of four walls =2(l+b)h

We know the value of 2(l+b)

Area of four wall=250×6

Area of four wall =1500m^2

Cost of painting =rate *area Cost of painting four walls =20*1500

Cost=30000rs