The perimeter of floor of a room is 30.cm and height 3m find the area of four walls of the room
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look,it's simple.
perimeter of rectangle=2(l+b)
height is 3m.
now the formula used for finding surface are of walls is 2h(1+b)
here you can clearly see there is 2(l+b) when you remove h.so the procedure is as follows
perimeter=2(l+b)
=30 m(already given)
height=3m(also given)
therefore,
2h(l+b)
or can be written as 2(l+b)h
which is 30×3 m
=90m square
therefore the area of wall of room is 90 m ^2.
you can post your query in comment section if you have any.
hope helped.
MARK ME AS BRAINLIST.....
perimeter of rectangle=2(l+b)
height is 3m.
now the formula used for finding surface are of walls is 2h(1+b)
here you can clearly see there is 2(l+b) when you remove h.so the procedure is as follows
perimeter=2(l+b)
=30 m(already given)
height=3m(also given)
therefore,
2h(l+b)
or can be written as 2(l+b)h
which is 30×3 m
=90m square
therefore the area of wall of room is 90 m ^2.
you can post your query in comment section if you have any.
hope helped.
MARK ME AS BRAINLIST.....
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