A semi-circle has a diameter of 32cm there is a another hole which is a semi-circle with a diameter of 16cm .Find the perimeter of the bigger semi-circle.(Take PI as 22/7)

Perimeter of Circles

Perimeter of the object is 91.4285 cm

Step-by-step explanation:

The perimeter of a circle is defined as

The perimeter of outer arc will be

The perimeter of inner arc will be

Where is radius of bigger semicircle and is radius of smaller semicircle

Given diameter of outer semicircle  = 32 cm

= 32/2 = 16 cm

Given diameter of outer semicircle  = 16 cm

= 16/2 = 8 cm

So the perimeter of the object =

Perimeter P = 22/7 * (16 +8 ) + 2 * 8 =

P = 22/7 * 24 +16

So P = 75.4285 +16 = 91.4285 cm

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

3, 12, 48, 384, 1536, 6144, 24576, 98304

step-by-step explanation:

just keep timing it by 4.