Question

2. A hall is 15 m long, 10 m broad and 4 m
high. What is cost of cementing its four
walls at the rate of Rs 10 per square metre
?
(2 Points)
Rs 2975
O Rs 2000
Rs 3500
Rs 2900​

Answer 1

Answer ⤵️

Area = 2h(l+b)

We have, l=6m; b=4m; h=3m

Therefore, Area = 2 x 3 (6+4) = 6(10)=60m

2

Therefore, the area of four walls is 60

2

Now, we have find the area of the floor =(l×b)=(6×4)=24m

2

Thus, area of floor+area of 4 walls = 60m

2

+24m

2

= 84m

2

Thus, the cost of laying tiles on its floor and its four walls at the rate of Rs.80/m

2

= 84 x 80= 6720 Rs.