1.

2. The surface area of 10cm x 4cm x 3cm brick1) 84sq.cm2) 124sq.cm3) 164 sq.cm4) 180sq.cm

Answer»

Surface area of brick

= 2 × ( LB + BH + HL)

= 2 × ( 40 + 30 + 12)

= 2 × ( 70 + 12)

= 2 × ( 82)

= 164 cm²

option (c)



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