4(x-2) meters of rope is used to fence the rectangular enclosure . find x
[length of rectangle is 25 m and area is 225m square]
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4(x-2) meters of rope is used to fence the rectangular enclosure . find x
[length of rectangle is 25 m and area is 225m square]
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A/Q
Area of rectangle = 225
L × b = 225
25×b=225
b=225/25=9
perimeter of rectangle = 4(x-2)
2(l+b) = 4(x-2)
2(25+9)= 4(x-2)
2×34 = 4x - 8
68+8=4x
4x=76
x=76/4=19
Verified answer
Length = 25 mbreadth = b (say)
area = 225
25 x b = 225
b = 9
now
perimeter = 2( 25 + 9) = 2x34 = 68 m
so
4(x-2) = 68
x - 2 = 68/4
x - 2 = 17
x = 19