5*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*55*5 5*5.
стягивающая дугу 90°.
центральный угол MON, образованный радиусами =90°. ΔMON: катеты OM=ON=R
R²=5²+5², R²=50
ОР- расстояние от центра до сечения.
ОР=5 см, ОР=ОМ=5 см. MN =10 см
Sсеч=MN*H
10=10*H, H=1 cм
Vцил=πR² *H
V=π50*1
V=50π
V/π=50π/π=50
ответ: 50