Question

Find the
breadth, and height of a cuboid are in the ratio 5:3.2 an
and its total area is 3.968 cm. Find the
The length, breadth a
dimensions of the cuboid.
of four walls of a room is 90 m-. If the room is 7 m long and more​

Answer 1

Answer:

Let the dimensions of cuboid be 5x,3x and 2x respectively.

Now,

TSA=3.968cm²

= 2(l×b + b×h + h×l)=3.968

= 2(5x×3x + 3x×2x + 2x×5x)=3.968

=2(15x² + 6x² + 10x²)=3.968

=31x²=3.968/2

=31x²=1.984

=x²=1.984/31

=x=√0.064

=x=0.25cm

Thus, dimensions are:

5x=5×0.25

=1.25cm

3x=3×0.25

=0.75cm

2x=2×0.25

=0.50cm