[ [Motion Problems ]

Author: Shnol D. $\cdot$.

Daddy, Masha, and Yasha are walking to school together. While Daddy takes 3 steps, Masha takes 5 steps. While Masha takes 3 steps, Yasha takes 5 steps. Masha and Yasha counted that together they made 400 steps. How many steps did Daddy take?
While dad makes 9 steps, Masha makes 15 steps, Yasha - 25, and Masha with Yasha together - 40. Since they together walked 400 steps, which is $10 \cdot 40$, then dad will walk 10 times more - 90 steps.

## Answer

90 steps.