Question

the Length breadth and height of a room are 5m 4m and 3 respectively find the cost of whitewashing the walls of the room and the ceiling at the rate rupees 750 per metre square. anyone know's??
plz explain step by step​

Answer 1

Answer:

Step-by-step explanation:

Area of 4 walls of room = 2h(l+b)

= 2×3(5+4)

= 54 sq. m

Area of ceiling = l×b

= 5×4 = 20 sq. m

Area of whitewashing = 54+20=74sq.m

Cost of whitewashing = 750×74 = Rs. 55500

PLEASE MARK IT AS BRAINLIEST.

Answer 2

Answer:

Step-by-step explanation:

Area of 4 walls=4(l+b)×h

=4(9)3

=108m^3

Cost=108×750=81000