Question

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Answer 1

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