A room 5 m by 4 m by 3 m has a marble flooring. Its walls and ceilings have been
painted light blue. Find the cost of marbling the floor at the rate of * 200 per sq m and
painting the walls and ceilings at the rate of 50 per sq m.
Answers
Answer:
total cost of marbling and = rs 7700
Step-by-step explanation:
solution -
l= 5 m , b = 4 m , h= 3m
area of the floor = 5×4 = 20m^2
surface area of six faces
= ( lb +bh +hl )
= 2 ( 5×4 +4× 3 +3× 5) m^2
= 2 ( 20 + 12 + 15 )m^2
= 2×47m^2 = 94 m^2
area of the walls and ceilings = 94 m^2 - area of the floor
= 94 m^2 -20m^2= 74m^2
cost of marbling 1 m^2= rs 200
cost of 20 m^2 = 200×20 = rs 4000
cost of painting 1m^2 = rs 50
cost of painting 74 m^2 = 50×74 =rs 3700
total cost of marbling and painting = rs 4000 + 3700= rs 7700
Answer:
total cost of marbling and = rs 7700
Step-by-step explanation:
solution -
l= 5 m , b = 4 m , h= 3m
area of the floor = 5×4 = 20m^2
surface area of six faces
= ( lb +bh +hl )
= 2 ( 5×4 +4× 3 +3× 5) m^2
= 2 ( 20 + 12 + 15 )m^2
= 2×47m^2 = 94 m^2
area of the walls and ceilings = 94 m^2 - area of the floor
= 94 m^2 -20m^2= 74m^2
cost of marbling 1 m^2= rs 200
cost of 20 m^2 = 200×20 = rs 4000
cost of painting 1m^2 = rs 50
cost of painting 74 m^2 = 50×74 =rs 3700
total cost of marbling and painting = rs 4000 + 3700= rs 7700