Question

7. If the perimeter of a semi-circular protractor is 88 cm,
find the diameter of the protractor. (Take n = 22/7)​






,

Answer 1

Answer:

56

Explanation:

let radius r

then perimeter is πr

πr = 88

22/7 x r = 88

r = 88 x 7/22

r = 28

and d = 2r

d = 28 x 2 = 56

Answer 2

Answer:

56 cm

Step by step explanation:

Perimeter of a semi-circle=πr units

πr=88

7

r=88× ----

22

r=28 cm

d=2r

=2×28

=56 cm

Diameter of the protractor=56 cm