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im posting the question sorry
here we are
Do you have the formula for the surface area of a cylinder?
2pirsq plus 2pirh
Surface area of fully cylinder = circumference * length. Here, you have half of it. So, 1/2*circumference*length = 1/2 * pi * 6 * 30 = 90 * pi
waheguru - that is when including bottom and top circles. In this case, the roof has no such thing. So, you just need 1/2 circumference * length.
@GT is right
oh so i included the bottom???
k so this is what i did 2 x pi x 3^2 + 2 x pi x 3 x 30 and divide by 2
Remove 3*pi*r^2 and the rest is good.
a. is right sure
Because the roof does not have a base and top (according to the problem description).
the question is asking for the area of the roofs curved surface - that does not include the two ends of the greenhouse
so just the lateral
the curved surface of a cylinder has a surface area of \(2\pi rh\). in this case you have half a cylinder, so the surface area becomes \(\pi rh\)
just practising for grade 9 EQAO
what is EQAO?
evil questions attacking ontario lol im kidding its like an exam for grade 9 students
lol! :-D - good luck with them...
is half perimeter of base multiply lenght=surface area
this very easy
@jhonyy9 - things are always easy when you know how to do them - try and recall the days when you were also at the lower end of the learning curve :-)
like we ALL were
yes right but this is the same like a rectangle curved on the base