Question

Suriace area of a box of cuboid shape is 500 sq. unit. Its breadth and height is 6 unit
and 5 unit respectively. What is the length of that box?
3. Side of a cube is 4.5 cm. Find the surface area of all vertical faces and total surface area
of the cube.
4. Total surface area of a cube is 5400
ortical face of​

Answer 1

Answer:

Step-by-step explanation:

1) Surface area of cuboid=2(bh+lb+lh)

500 unit ²=2(30+6l+5l)

500/2 = 30+11l

250-30=11l

220=11l

220/11=20=l

Hence, length=20 units

3)Surface area of vertical faces or lateral surface area =4a²

=4×4.5×4.5

=101 cm²

4) Total surface area (TSA)= 6a²

=6×4.5×4.5

= 121.5cm²

TSA= 5400 =6a²

5400/6=a²

√900=a=30

Hope it helps you!