Question

Three cubes of edge 10 cm each are placed side by side and stuck together. If the outer
surface alone is painted at 2 paise per cm2

, find the cost of painting.

Answer 1

$\huge\bf\pink{ᴀɴsᴡᴇʀ࿐}$

ʀᴇǫᴜɪʀᴇᴅ ᴀɴsᴡᴇʀ-:

S.A = 6 (l)2

S.A= (6 * 10 * 10) cm = 600 cm²

S.A of 3 cubes together = (3 * 600) cm = 1800 cm²

Painting cost of 3 cubes = 2 * 1800 = 3600 p

In Rs. = 1 Rs = 100 p

= 1p = 1/100 Rs

= (3600/100) Rs = Rs. 36

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