if the difference between cicumference and diameter is 90cm, then find its diameter.
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Answered by
7
If r is the radius of a circle then the diameter and circumference of the circle will be 2r and 2πr respectively. According to the question,
2πr-2r=90
or, r(2π-2)=90
or, r=90/{(2×22/7)-2}
or, r=90/(44/7-2)
or, r=90{(44-14)/7}
or, r=90×7/30
or, r=21 cm
2πr-2r=90
or, r(2π-2)=90
or, r=90/{(2×22/7)-2}
or, r=90/(44/7-2)
or, r=90{(44-14)/7}
or, r=90×7/30
or, r=21 cm
Answered by
0
Answer:
Step-by-step explanation:
2pieR+2R=90
2×22/7+R+2R=90
90×7/44=3R
Solve it you get the answer
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