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27cm2 : 57cm2 = 18cm : 38cm

Answer:

True

Consider the two ratios 27cm2 : 57cm2 = 18cm : 38cm

27/57 = 18/38

27/57 is further simplified by dividing both numerator and denominator by 3 we get,

= 9/19

18/38 is further simplified by dividing both numerator and denominator by 2 we get,

= 9/19

Hence, 9/19 = 9/19

Therefore, 27cm2 : 57cm2 = 18cm : 38cm

"hello students welcome to lido qna video
session i am saf your math tutor and
question for today is
a small indoor greenhouse herbarium is
made
entirely of glass panes including its
base
which is held together with the tape
it is 30 centimeter long 25 centimeter
wide
and 25 centimeter high
so it is asked that first what is the
area of the glass
second how much of the tape is needed
for trial edges
to find this let us first of all see
what is given
length of the greenhouse is given let us
say it is l
and length is given as 30 centimeter
then you have been given breath
let us say it is b so breath is given
that is 25 centimeter
and you have also been given the height
let us say it as
h
which is 25 centimeter
now we should first of all find in the
first question
that is total surface area the total
surface area of this greenhouse can be
given by
let us say it is a so a is equal to
2 into length into breath
plus breath into height plus height into
length
so this will give us 2 into
30 into 25
plus breath into height
that is 25 into 25
plus
30 into 25 again
so that is as per the formula
proceeding with further calculation that
is 2 into
750 plus
25 into 25 that is 625 plus
750 and this is equal to 2 into
2125 so it comes out to be
4250
centimeter square
so total surface area of the glass is
four to five zero centimeter square
now once we have found this we can
proceed further with our second part of
the question
in the second part it is to ask that how
much tape is needed for
all 12 edges so let us continue our
second part over here
now see the figure which is drawn over
here from the figure
tape is required along the sides a b
b c c d b a
e f f g g h
h e a h b e
d g and cf these are the all sides for
which the tape is required
so total length of the tape will be
four times
length plus breadth plus height
so this will become 4 into
30 plus 25 plus 25
and is equal to 320
centimeter so length of the tape
will be 320
centimeter
for all 12
edges
so this is our final answer if you have
any query you can drop it in our comment
section
and subscribe to lido for more such q a
thank you for watching
"

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