outer diameter of a metal washer is 7 cm and the inner diameter is 3.5 CM if the washer has to be painted on both sides what is the area to be painted
Answers
Answered by
2
Answer:
answer is 7cm
Step-by-step explanation:
because outer cm is equal
Answered by
3
Step-by-step explanation:
Outer diameter = 7cm
outer radius = 7/2= 3.5cm
outer area = π*r²
= 22/7*7/2
= 11cm²
inner diameter = 7/2 cm
inner radius = (7/2)/2 = 7/4 cm
therefore inner area = 7/4*22/7
= 11/2 cm²
= 5.5 cm²
therefore area to be painted = 11cm²-5.5cm²
= 5.5cm²
Ans = 5.5cm²
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