The length,breadth and height of a room are 7m,5m,3m respectively. Find the cost of painting the four walls and ceiling of the room at Rupees 10 per sq m.
Plz give me answer of this question fast............
Answers
As given
Length = 7 m
Breadth = 5 m
Height = 3 m
Then
Area of four walls = 2( l+ b) × h =2×(7+5) ×3 = 2×12×3 =72 m square
And
Area of ceiling = l× b = 7×5 =35 m square
Total area = 72+35 =107 m square
Therefore
Cost of painting the four walls and ceiling of the room at ₹10 per m square = 107×10 = ₹1070
I hope it is right answer and it helps you.
Answer:
Length = 7m
Breadth = 5m
Height = 3m
Area of Four wall = perimeter × height
= 2( L + B ) × H
= 2( 7 + 5 ) × 3
= 2 × 12 × 3
= 72 sq. m
And ,
Area of the Ceiling = Length × breadth
=( 7 × 5 ) sq. m
= 35 sq. m
Total area to be painted = area of four walls + area of the ceiling .
= 72 sq. m + 35 sq. m
= 107 sq. m
Now,
Rate of Painting = ₹ 10/m^2
Cost of painting 107 sq. m = 107 × 10
= ₹ 1070
Hence, The cost of painting the four walls and ceiling of the room is ₹ 1070 .
Hope it helps you...