Question

2. The floor of a rectangular hall has a perimeter of 280 m. its height is 6 m. Find the cost of white washing
the four walls (including door, windows etc.) at the rate of Rs 10 per m2​

Answer 1

Answer:

ans will be ₹16800

Step-by-step explanation:

perimeter is 280 so

p= 2(l+b) =280

so l+b =140 so

we will now find csa and h is given 6m

csa=2h(l+b)

2×6(140)

1680

cost of 1m is ₹10 so for 1680m it will be 1680 × 10 that is 16800

Answer 2

Answer:

area = 804 m sq

total cost = 8040 rs

Step-by-step explanation:

perimeter of floor = 280 m

height = 6 m

perimeter of a rectangle = 2(l + b)

= 2( l + 6 ) = 280

2l + 12 = 280

2l = 268

l = 268/2 = 134

area of a rectangle = lb = 134(6) = 804 m sq

rate per m sq = 10 rs

total cost = 10(804) = 8040 rs