Question

the length, breadth and height of a room are 5m 4m and 3m respectively.find the cost of white washing the Wall of the room and the ceiling at the rate of ₹7.50 per metre square​

Answer 1

Hope it helps. Area is 74m² and cost is ₹555.00

Answer 2

★FIND:

the cost of white washing the Wall of the room and the ceiling at the rate of ₹7.50 per metre square =?

★GIVEN,

LENGTH =5m

BREADTH=4m

HEIGHT =3m

★SOLUTION:

Area to be white washed=Area of 4(four) walls + Area of ceiling (don't use floor)

➡️2(l+b)×h+(l×b)

➡️2(5+4)×3+(5×4)

➡️2(9)×3+20

➡️18(3)+20

➡️54+20

➡️74m^2

$<font color="blue">$Cost of white washing =(7. 50)(74)

➡️750/100×74

➡️55500/100

➡️555rs

the cost of white washing the Wall of the room and the ceiling at the rate of ₹7.50 per metre square = 555rs