Question

length is 9cm, breadth is not given, height is 5cm and volume is 405cm³​

Answer 1

length=9cm
breadth=x
height=5cm
volume=405cm^3

vol.=l×b×h
405=9×x×5
405/45=x
9=x

the breadth is 9cm.

Answer 2

b=v/lxb

b=405/9x5

b=405/45

b=9cm