a circular carpet of diameter 1.4m is spotted in the centre with a 20cm striped border. find the area of the striped portion of the carpet to the nearest cm2
dipu19:
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Answers
Answered by
7
☆Hello friend☆
Let's convert 1.4m into cm=140cm
Radius=140/2=70cm
Extra strip is of diameter=20cm/2
Radius =10cm
So, radius for outer circle=80cm
Area of that path or strip=22/7 ×R^2-22/7×r^2
= 22/7(R^2-r^2)
= 22/7 ×(80+70)cm(80-70)cm
= 22/7×150cm×10cm
= 33000cm^2/7
Hope it helps☺☺☺
Let's convert 1.4m into cm=140cm
Radius=140/2=70cm
Extra strip is of diameter=20cm/2
Radius =10cm
So, radius for outer circle=80cm
Area of that path or strip=22/7 ×R^2-22/7×r^2
= 22/7(R^2-r^2)
= 22/7 ×(80+70)cm(80-70)cm
= 22/7×150cm×10cm
= 33000cm^2/7
Hope it helps☺☺☺
Answered by
2
Answer:
33000 cm /7 this is the answer
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