SOLUTION: Plz help me solve this question Q1 .A rectangular piece of land measures 0.8 dm by .5 dm it is to be fenced with four lines of wire what length of wire is needed Q2. A rectan

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Question 939903: Plz help me solve this question
Q1 .A rectangular piece of land measures 0.8 dm by .5 dm it is to be fenced with four lines of wire what length of wire is needed
Q2. A rectangular garden is 105 metre by 75 metre. how many round of this garden will a boy make, if he runs 3600 metres.
Q3. Find the perimeter of square equal in area to two squares whose sides are 12 metres and 5 metres respectively.
Answer by MathLover1(20855) About Me  (Show Source):
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Q1 .A rectangular piece of land measures L=0.8dm by W=.5dm
it is to be fenced with four lines of wire
the length of wire that is needed is equal four times the perimeter of a rectangular piece of land
if land measures L=0.8dm by W=.5dm, perimeter is P=2%280.8dm%2B0.5dm%29
P=2%281.3dm%29
P=2.6dm
four times the perimeter is:4%2A2.6dm=10.4dm-the length of wire that is needed

Q2. A rectangular garden is 105m by 75m.
how many round of this garden will a boy make, if he runs 3600m
divide 3600m by perimeter
P=2%28105m%2B75m%29
P=2%28180m%29
P=360m
360cross%280%29cross%28m%29%2F36cross%280%29cross%28m%29=360%2F36=10
a boy will make 10 rounds

Q3. Find the perimeter of square equal in area to two squares whose sides are 12m and 5m respectively.
We know perimeter of square A=+4%28side%29
So side of first square is +12m and area is +12m%2A12m=144m%5E2
Side of second square is 5mand area is +5m%2A5m=25m%5E2
the area of both is ++144%2B25=169m%5E2
Area of third square is equal to the area of both squares above, so,the area of third square is ++169m%5E2

So side of third square = 13m [because 13m%2A13m=169m%5E2]
Perimeter+=+4%2ASide+=+4%2A13m+=+52m