Question

the floor of a rectangular has perimeter 300 cm. Let the cost of painting of four walls of rupees 12 per cm is Rs 24000 then find the height of hall

Answer 1

we have perimeter = 2(l+b) = 300cm
CSA of rectagular hall = cost / Cost of painting per cm²
               = 24000/12 = 2000cm²
CSA of rectagular hall = 2(l+b)h = 2000cm²
                                    = 300h = 2000
                                    = h = 2000/300 = 6.66cm
Mark it as brainliest answer PLZ.............
 

Answer 2

Answer:Perimeter of a rectangular hall=300cm

2(l+b) =300

(l+b) =300/2

(l+b) =150cm

Rate=24000/12

=2000

Now, 2h(l+b) =2000

2×h×150=2000

=h =2000/300

Ans =20/3.