Answer: 120m
Step-by-step explanation:
Width = 20m
Length = 2 × width
= 2 × 20m
= 40m
We've to calculate the perimeter
Perimeter = 2(length + Breadth)
= 2(20m + 40m)
= 2(60m)
= 120m
Answer: a=1 b=3
Step-by-step explanation: the x for each of the points are 1 and 3
Answer:
The new point should be 8,-5.
Step-by-step explanation:
Answer:
Step-by-step explanation:
Let the length and breadth of the rectangle be a,b units respectively.
Then the area will be ab square units.
Now if the length of the rectangle is reduced by 5 units and breadth is increased by 2 units then new length and breadth will be (a−5) units and (b+2) units.
Then new area will be (a−5)(b+2).
Then according to the problem,
(a−5)(b+2)−ab=−80
or, 2a−5b=−70.......(1).
Now if length of the rectangle is increased by 10 units and breadth is decreased by 5 units then new length and breadth will be (a+10) units and (b−5) units.
Then new area will be (a+10)(b−5).
Then according to the problem,
(a+10)(b−5)−ab=50
or, 10b−5a=100
or, 2b−a=20
or, 4b−2a=40......(2).
Now adding (1) and (2) we get
−b=−30
or, b=30.
Putting the value of b in (1) we get, a=40.
Now a+b=40+30=70.
Hey i would answer but you didn’t provide enough context! make sure to upload images with your question hun.