Question

Answer 1

\(\dfrac{AB}{CD}=\dfrac{3}{5}\\ =>\dfrac{15}{CD}=\dfrac{3}{5}\\ =>CD=25\left(cm\right)\)

Answer 2

Ta có: `(AB)/(CD) = 3/5`

`=> (15)/(CD) = 3/5`

`=> CD = 25cm`

Answer 3

\(\text{Ta có:}\dfrac{AB}{CD}=\dfrac{3}{5}\left(gt\right)\)

\(\text{ Mà AB=15cm(gt)}\)

\(\Rightarrow\dfrac{15}{CD}=\dfrac{3}{5}\Rightarrow CD=\dfrac{15.5}{3}=25\left(cm\right)\)