a circular photo frame has an outer radius 20cm and inner radius 18cm.find the width of the frame around the photo.also the cost of painting it with metallic colour at the rate of $0.7 per cm square.take 22÷7
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heya frnd!
here's ur answer...
given:-
outer radius of the frame=20cm
inner radius of the frame=18cm
area of total photo frame=πr²
=22/7×20×20
=8800/7cm²
area of the photo only=πr²
=22/7×18×18
=7128/7cm²
area of the frame=8800-7128/7
=1672/7cm²
cost of painting it with metallic colour if per m² costs $0.7=1672×0.7/7
=1170.4/7
=$167.2
hence, final answer means total cost of painting the frame is $167.2
hope this helps...
here's ur answer...
given:-
outer radius of the frame=20cm
inner radius of the frame=18cm
area of total photo frame=πr²
=22/7×20×20
=8800/7cm²
area of the photo only=πr²
=22/7×18×18
=7128/7cm²
area of the frame=8800-7128/7
=1672/7cm²
cost of painting it with metallic colour if per m² costs $0.7=1672×0.7/7
=1170.4/7
=$167.2
hence, final answer means total cost of painting the frame is $167.2
hope this helps...
nuhamaryam:
you are really amazing
my pleasure
is my answer right or wrong
because another user who answered ur question have different answer
it is right
thank you
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