Question

Q. 6 solve only moderator only only moderator any other don t see

Answer 1

$r1 = 50cm \\ r2 = 20$

$area = \pi( {(r1)}^{2} - {(r2)}^{2} )$
$area \: = 22 \div 7 \times (50 + 20)(50 - 20)$
$area = 22 \div 7 \times (70)(30)$
$area = 22 \times 10 \times 30$
$area = 6600 {cm}^{2}$
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Answer 2

area of garden =πR^2=22/7 ×50×50 = 55000/7 sqm

area of pond = πr^2 = 22/7 ×20×20 = 8800/7

Area of land left = 55000/7 -8800/7

= 46200/7

= 6600 sq meter

$\huge \boxed {\textt {\fcolorbox{Area of the Land =6600 sqm}}}$