The dimensions of the cuboidal shaped room of Ram Shankar is 10m , 8m and 4m
respectively. Find the total cost of painting of the four walls and ceiling at the cost of
5Rs/m².
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Step-by-step explanation:
length of the room= 10m
breadth of the room= 8m
height of the room= 4m
area of the four walls= {2×(l+b)×h} sq. units
= { 2× (10+8)×4} m²
= { 2× 18×4}m²
= (36× 4)m²
= 144m²
area of the ceiling= (l×b) sq. units
= (10×8) m²
= 80m²
total area to be painted = (80+144)m²= 224m²
rate of painting= 5Rs/m².
cost of painting the four walls and the ceiling= (5×224) rupees= Rs 1120
answer: Rs 1120
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