Question

the perimeter of the floor of a rectangular hall is 250 m and height 8 M find the cost of painting its four walls at the rate of rupees 5 per square metre

Answer 1

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

Answer 2

perimeter of rectangle= 2(l+b)

250=2(l+b)

125=l+b

area of four wall =2(l+b) ×h

=250×8=2000

20000/5= ₹400 is cost for painting.