Question

2)
सखारामच्या शेतातील विहिरीचा व्यास 20 मीटर
आहे. त्या विहिरीच्या सभोवती 0.5 मीटर रुंदीची
पायवाट आहे. तर आकृतीत दाखविल्याप्रमाणे
पायवाटेच्या जागेचे क्षेत्रफळ किती असेल ?​

Answer 1

Given :   Diameter 20 m of well

a foot path around well of width  0.5 m

To Find :   Area of foot path

Solution:

Well Diameter = 20 m

Radius = Diameter/2

=> Well Radius = 20 /2  = 10 m

Internal radius  r= 10 m

External radius  R = 10  + 0.5 = 10.5 m

Area of foot path = π (R² - r²)

= 3.14 × ( (10.5)² - 10²)

=  3.14× ( 10.25)

= 32.185  m²

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