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Q.1
Let three consecutive integer is x-1 , x ,x+1 .
so ,
2(x-1)+3x+4(x+1) = 56
2x-2+3x+4x+4 = 56
9x =56-4+2
so , x= 54/9 = 6
there integer are (6-1) = 5 , 6, (6+1)=7
Q.2
let length & breadth of the plot is 11x & 4x respectively .
total length of fence become 2(11x+4x) = 30x
so , 100× 30x = 75000
so , x = 75000/3000 =25
so length = 11×25 = 275 m
breadth= 11×4 = 44 m
Q.3
let the number is x
(x-5/2)×8 = 3x
8x- 20= 3x
x = 20/5 = 4
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