Question

Answer for the 9th one

Answer 1

Step-by-step explanation:

Area of 4 walls=2(7+5)3

=2×12×3

=24×3

=72 cm²

cost of painting the wall =72×10=rs720

Answer 2

Answer:Rs. 1070

Step-by-step explanation:

L =7m

b=5m

h=3m

Area of walls and ceiling =

lateral Surface area of cuboid + area of rectangle

=2 (bh + hl) + lb

=2×(5×3+3×7) + 7×5

=2×(15+21) + 35

=2× 36+35

=72+35

=107

Cost= area to be painted + rate per sq. n

=107 × 10

= Rs. 1070

hope this helps

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