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Step-by-step explanation:
Answer 1.)
Perimeter of a circle=2пr=66
2*22/7*r=66
r=66/22*7/2
r=21/2=12.5 cm
Answer 2.)
Perimeter of a circle=2пr=2*22/7*14=88 m
Answer 3.)
Perimeter of a semicircle=пr=162
22/7*r=162
r=7.36*7
r=51.52 cm
Answer 4.)
The circumference of outer circle is given as 132 cm.
Finding the radius of the outer circle,
2πr = 132
r = 21 cm
Now circumference of inner circle is given as 88 cm.
Finding the radius of inner circle,
2πr = 154
R
then, you can find the width on your own by applying formula:-
П(R²-r²)
Answer 5.)
area swept by hour hand=Пr²=22/7*8.4*8.4=1552.32/7=221.76 cm²
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