Q. 1105.0( 5 Votes )

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Answer :

Divide the give fig. into two

Perimeter of first shape = 2a + 2b

= 2(x + 2) + 2(2x + 2)

Perimeter of second shape = 2a + b

= 2(x + 1) + (2x + 2)

Total perimeter = 77 cm

2(x + 2) + 2(2x + 2) + 2(x + 1) + (2x + 2) = 77

2x + 4 + 4x + 4 + 2x + 2 + 2x + 2 = 77

10x + 12 = 77

10x = 77-12

10x = 65

x = 65/10 = 6.5cm

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