The length of the shadow of a tree of height 4.8 m is 9.0 m. At the same time, the length of the shadow ( in meter ) of a building 43.2 m high is:

81 

The given ratio of height and length:

⇒ Tree : Shadow = 4.8 : 9.0 = 8 : 15

*At the same time the above ratio remains same*

Therefore, ratio of height and length:

⇒ Building : Shadow = 8 : 15

Here,

⇒ 8R = 43.2

⇒ Length of shadow = 15R = \(\frac{43.2}{8}\) × 15 = 81 m