Question

a hall is 12m long , 10m wide and 5m high. its wall and the roof are to be white washed from inside . find the total area to be whitewashed . also find its cost at the rate of rupees 5.40 per square metre​

Answer 1

Answer:

64mm..,.....................

Answer 2

Answer:

340 m^2, Rs. 1836

Step-by-step explanation:

Total area to be washed = Area of four walls + Area of ceiling

                                         = 2(l + b)h + lb = 2(12 + 10)5 + 12*10

                                                                  = 220 + 120 = 340 m^2

Cost at Rs. 5.40 / m^2 = 340 * 5.4 = 34 * 54 = Rs. 1836