Question

please answer question no.22​

Answer 1

Let breadth of the rectangle be x. then

the length of the rectangle is 3 x perimeter of rectangle = 2×(l+b).

2×(3x+x) = 2×4x = 8x

Therefore 8x = 168

》 x = 168/8 = 21

Hence breadth = 21m and length = 3 × 21 = 63m

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Answer 2

p= 2(l+b)
168 = 2(x+3x)
168= 2x+6x
168=8x
x= 21
3x= 3×21
=63
area = l×b
= 21×63
=1323m2