Question

A room is 8.5m long,6.5m broad and 3.4m high.It has two doors,each measuring (1.5m by 1m) and two windows,each measuring
(2m by 1m).Find the cost of
painting its four walls at Rs.160 per m^2.

Answer 1

Answer:

Step-by-step explanation:

Length of room=8.5 m

Breadth of room=6.5 m

Height of room=3.4 m

area of four walls= 2[(l+b)×h]

= 2[(8.5 + 6.5) ×3.4]

=2[15×3.4]

=2×51

= 102m^2

Area of two doors =2[l×b]

=2[1.5×1]

=2×1.5

= 3m^2

area of window = 2[l×b]

=2[2×1]

=2×2

=4m^2

area of four walls excluding the doors and windows= area of four walls _ area of door + area of window

=102 _ 3+4

= 102 _ 7

=95m^2

cost of painting its four walls = area of four walls excluding doors and windows ×160 per m^2

=95×160

=15200rupees

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