Solving this problem is just pretty straight forward. All
we have to do is to use the concept of ratio and proportion.
First, let us say that the height of the telephone pole
takes the value of variable x.
From the given, we know that the ratio of the telephone
pole to its shadow is
x : 17 m
And the ratio of the statue to its shadow is
68 cm: 97 cm
To solve for the value of x, we equate the two:
x : 17 = 68 : 97
We know that the symbol of ratio which is “:” also means
division, therefore:
x / 17 = 68 / 97
x = 17 * 68 / 97
x = 11.92 m
Therefore the telephone pole is about 12 m high