Question

katta doiraning radiusi 1,3 dm ga, boʻyalgan yuz esa 1,44π kv.dm ga tenh. kichik doiraning radiusini toping.​

Answer 1

Ответ:

r = 0,5

Пошаговое объяснение:

R = 1,3 dm

S(3) = 1,44 π dm²

r - ?

S(1) = πR²

S(2) = πr²

S(3) = S(1) - S(2)

1,3²π - πr² = 1,44 π | :π

1,3² - r² = 1,44

-r² = 1,44 - 1,69

r² = 0,25

r = √0,25 = 0,5