Question

A room 5 m long, 4.5 m wide and 3.6 m high
has one door 1.5 m by 2.4 m and two
windows, each 1 m by 0.75 m. Find :1 the area of its walls excluding doors and windows 2m the cost of disemptering its walls at the rate of ₹4.50per m² 3 the cost of painting its roof at the rate of ₹9 per m²​

Answer 1

Answer:

hi here is the answer

Step-by-step explanation:

Length of the room = 5 m

Breadth of the room = 4.5 m

Height of the room = 3.6 m

Area of the roof = L × B

= 5 × 4.5 m2

= 22.5 m2

Area of four walls = 2[L + B] × H

= 2[5 + 4.5] × 3.6

= 2(9.5) × 3.6

= 19 × 3.6

= 68.4 m2

Area of one door = 1.5 × 2.4 m2

= 3.60 m2

= 3.6 m2

= 68.4 m2

Area of one window = 1 × 0.75 m2

= 0.75 m2

Area of 2 windows = 0.75 × 2 m2

= 1.5 m2