the length of a rectangular playground is twice to its width. The perimeter is 30. Find its dimension.
please solve in matrix
[ inversion method]
Answers
Answered by
14
The perimeter of rectangular ground is 30 given..
1) length is 2x, width is x
Perimeter of rectangle is 2(l+b)...
30=2(2x+x)..
30=2(3x)..
30=6x
X=30/6
X=5.. Answer
x=5 width
2x=10 lenght
Dimension is 5×10=50
1) length is 2x, width is x
Perimeter of rectangle is 2(l+b)...
30=2(2x+x)..
30=2(3x)..
30=6x
X=30/6
X=5.. Answer
x=5 width
2x=10 lenght
Dimension is 5×10=50
rizwanu973:
please solve by cramer's rule or inversion method
Answered by
4
LET LENGTH BE X
LET WIDTH BE Y
LENGTH=2Y
30=2(2Y+Y)
30=2(3Y)
30=6Y
30/6=Y
Y=5=WIDTH
X=10=LENGTH
X=10
LET WIDTH BE Y
LENGTH=2Y
30=2(2Y+Y)
30=2(3Y)
30=6Y
30/6=Y
Y=5=WIDTH
X=10=LENGTH
X=10
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