A room is 10 m long, 7 m broad. It has two windows each measuring 2 m by 1 m and two doors each measuring 1.5 m by. 5 m. If the height of the room is 15 m,then find the cost of painting its four walls at rupees 6.20 per square meter.
Answers
Answer:
Cost =Rs.15200
Step-by-step explanation:
Given : A room is 10 m long, 7 m broad. It has two windows each measuring 2 m by 1 m and two doors each measuring 1.5 m by. 5 m. If the height of the room is 15 m.
To find : The cost of painting its four walls at rupees 6.20 per square meter?
Solution :
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
= 102 meter square.
Area of two doors =2[l×b]
=2[1.5×1]
=2×1.5
= 3 meter square.
Area of window = 2[l×b]
=2[2×1]
=2×2
=4 meter square.
Area of four walls excluding the doors and windows
= area of four walls -area of door + area of window
=102 -3+4
= 102 -7
=95 meter square.
Cost of painting its four walls = area of four walls excluding doors and windows × 160 per m^2
Cost =95×160
Cost =Rs.15200