Question

closed box is in the shape of a cube has total outer surface area of 150 cm square what is the length of its side in centimetre side in centimetres

Answer 1

Answer:

5 Cm

Step-by-step explanation:

Given---> Total outer surface area of a cube is 159 cm².

To find---> Length of side of cube.

Solution----> We know that ,

Total surface area of cube = 6 ( side )²

ATQ,

Total surface area of cube = 150 cm²

=> 6 ( Side )² = 150

=> ( Side )² = 150 / 6

=> ( Side )² = 25

=> Side = √25

=> Side = 5 Cm

Additional identities--->

1) Volume of cube = Edge³

2) Lateral surface area = 4 ( Edge )²

3) Volume of cuboid = l b h

4) Total surface area of cuboid = 2 ( l b + b h + l h )

5) Lateral surface area = 2 ( l + b ) h

6) Volume of cylinder = π r² h

7) Volume of cone =( 1 / 3 ) π r² h