Question

Two concentric circle of radii 20cm and 15cm .Find the area of the path

Answer 1

Answer:

550 cm Sq.

Step-by-step explanation:

Area of path = area of larger circle--area of smaller circle.

$\pi \times 20 { }^{2} - \pi \times 15 {}^{2} \\ implies \\ = \pi(20 { }^{2} - 15 {}^{2} ) \\ = \pi(400 - 225) \\ = (22 \div 7)(175) \\ on \: dividing \: 175 \: by \: 7 \: we \: get \\ = 22 \times 35 \\ = 550 {cm}^{2}$