A well with a brick parapet around it has diameter 210 cm of the length of the outer edge of parapet is 880 cm then find the width of the parapet
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Given, the diameter of the well (d) = 210cm.
Let radius and diameter of the parapet is R and D respectively.
Sine, length of the outer edge of the parapet = 880 cm.
Therefore,
2πR = 880cm
2R = 880 / π = (880 x 7 )/22 = 280 cm
D = 210 cm.
Now, width of the parapet = ( diameter of parapet - diameter of the well)/2 = (280-210)/2 = ( 70)/2 = 35cm
Hence, width of the parapet is 35 cm.
Hope u understand ☺️
Let radius and diameter of the parapet is R and D respectively.
Sine, length of the outer edge of the parapet = 880 cm.
Therefore,
2πR = 880cm
2R = 880 / π = (880 x 7 )/22 = 280 cm
D = 210 cm.
Now, width of the parapet = ( diameter of parapet - diameter of the well)/2 = (280-210)/2 = ( 70)/2 = 35cm
Hence, width of the parapet is 35 cm.
Hope u understand ☺️
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