The given cones are similar .Similar figures have sides in proportion.
Forming the proportion for similar sides in the two cones we have:
\(\frac{10}{3}.=\frac{3}{x}.\)
This is of the form :\(\frac{a}{b} = \frac{c}{d}.\)
We can cross multiply.
Cross multiplying we have:
10x=9
Dividing both sides by 10 we have
x=\(\frac{9}{10}.\)
x=0.90.
