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(2 x 9 x 7)cm2 + (2 x 4 x 7)cm2 + (2 x 9 x 4) cm2

= 126cm2 + 56cm2 + 72 cm2

= 254cm2

a) total painted area is 254cm2.

(2 x 7 x 5) + (2 x 2 x 5) + (2 x 7 x 2) = 118

b) No of cube with 1-face painted is 118

 

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