the radius of semicircular protector is 35m then it's perimeter is
a. 90m
b. 180m
c. 45m
d. 120m
Answers
Answer:
pi×r+2r
22×35/7+70
22×5+70
110+70
180m
hope it will help u
Given : The radius of a semicircular compound is 35 m.
To Find : Perimeter. (a) 45 m (6) 90 m (c) 135 m (d) 180 m
Solution:
Radius = 35 m
Perimeter of semicircle = (1/2) Circumference of circle + Diameter
Diameter = 2 * radius = 2 * 35 = 70 m
Circumference of circle = 2 π r
(1/2) Circumference of circle = (1/2) 2 π r
π = 22/7 r = 35 m
= (1/2) * 2 * (22/7) * 35
= 22 * 5
= 110 m
Perimeter = 110 + 70 = 180 m
Correct option is d) 180 m
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