Question

the length of a room is 20 meters breath 15 meters and height 8 meters what will be the cost of white washing it at the rate of 5 praise per square meter is

Answer 1

Hey there!

The length of a room is 20 meters breath 15 meters and height 8 meters what will be the cost of white washing it at the rate of 5 praise per square meter is?

Given
Length (l) = 20 m
Breadth (b) = 15 m
Height (h) = 8 m

T.S.A =
$2(lb \times bh \times hl)$
$2(20 \times 15 + 15 \times 3 + 8 \times 20)$
$2(300 + 120 + 160)$
$2 \times 580$
$= 1160m {3}^{}$

Rate of white washing if 5 paise per square meter = 5800 paise

= Rs. 58

Answer 2

area of room = l*b*h

area of floor =l*b

so the answer will be ₹105