Question

A room with measurement 25m × 15m × 11m
is to be whitewashed find the total cost
of whitewashing all four walls of a room.
If the cost of whitewashing is Rs.21 per m²​

Answer 1

Answer:

18480

Step-by-step explanation:

L.S.A of cuboidal room= 2h(l+b)

2(11) (25+15)

22(40)

880m^3

Cost of whitewashing:-880*21

18480 rupees

Answer 2

Lateral Surface area of cuboid=

$2h(l + b)$

So l= 25m

b= 15m

h= 11m

= 2×11(25 + 11)

= 22×40

=880m²

If cost of white washing 1m²= ₹21

then cost of whitewashing 880m²= 792×21= ₹18480/-

So, hence cost is ₹18,480/-