Question

a+b 2a,3b,c-2a,3bc ko sarl kro​

Answer 1

8. (a+b) (2a • 3b • c) - (2a•3b)

= (a+b) (6abc) - (2a•3b)

= 6a²bc + 6b²c - (2a•3b)

= 6ab (abc + bc) - 6b Ans......

9. For cylinder >>>>

TSA OF CYLINDER = 2πr(h+r)

TSA = 2×3.12(7+7)

TSA = 6.24×14

((((total surface area of the cylinder = 87.36cm² ))))

FOR CUBE>>>>>>

TSA OF CUBE = 6a²

TSA = 6 × 7²

TOTAL SURFACE AREA OF CUBE = 294 cm²

hence the cube has more surface area in comparison to the cylinder....