Решение:
- QR = \(\frac{4}{25}\) · 3 + \(\frac{3}{25}\) = \(\frac{12}{25}\) + \(\frac{3}{25}\) = \(\frac{15}{25}\) = \(\frac{3}{5}\) (см)
- Пусть PR = x, тогда \(\frac{3}{25}\) = х, значит, х = \(\frac{3}{25}\)
- P = PQ + QR + PR
P = \(\frac{4}{25}\) + \(\frac{3}{5}\) + \(\frac{3}{25}\) = \(\frac{4}{25}\) + \(\frac{15}{25}\) + \(\frac{3}{25}\) = \(\frac{22}{25}\) (см)
Ответ: \(\frac{22}{25}\) см