Длина прямоугольника равна́ 30 см. Какой станет длина, если при неизменной площади ширину прямоугольника увеличить в 1,5 раза? Укажите искомую длину в сантиметрах.

\( 16 \quad \) How long is an arc intercepted by the given central angle in a circle of radius 3.97 km ?

\( 1 \leqslant \quad \begin{array}{l}\text { Two gears are adjusted so that the smaller gear drives the } \\ \text { larger one, as shown in the figure. If the smaller gear } \\ \text { rotates through an angle of } 270^{\circ} \text {, through how many } \\ \text { degrees will the larger gear rotate? }\end{array} \)

find the center and radius of the circle \( x^{2}-2 x+y^{2}=3 \)

Two gears are adjusted so that the smaller gear drives the larger one, as shown in the figure. If the smaller gear rotates through an angle of \( 270^{\circ} \), through how many degrees will the larger gear rotate?

find the center and radius of the circle \( x^{2}-2 x+y^{2}=3 \)