Mensuration Practice Test 9

Question : 10 of 40

Marks: +1, -0

Find the cost of painting the outer side of a cube whose edge is 6 cm if 1 kg paint covers 12

cm^2

and the cost of 1 kg paint is Rs 42.50.

Solution:

Surface area of a cube =

6a^2

= 216 cm
Quantity of paint required =

{216}/{12}

= 18 kg
Cost of painting = 18 × 42.50 = Rs 765

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