area of a square 5 square meter more than 1/2 of the area of a rectangle if the area of the square is 125 meters squared find the dimension of the rectangle if the breadth of the rectangle is 3/5 times of the length of the rectangle
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Answer:
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Step-by-step explanation:
let the length of rectangle be l m and it's breadth be b m
so now here area of square=125 sq.metre
so now according to given condition
area of square=5+1/2×area of rectangle
now we know that area of rectangle=l×b
thus accordingly
125=5+1/2×(lb) (1)
now but is said that
b=3/5×l (2)
thus substituting value of b in (1)
we get
125=5+1/2×3l/5×l
=3l square/10+5
=3l square+50/10
multiplying dividing by 10 on both sides
we get 3l square+50=1250
so 3l square=1200
ie l square=400
so taking square roots on both sides
we get l=20 or l=-20
but as dimensions length are never negative
l=-20 is absurd
thus l=20 m
so substitute value of l in (2)
we get b=12 m
hence dimensions of rectangle are 20 m×12 m