1.

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Answer»

Circumference of circle = 2 × π × r =>2 × 22/7 × 154/10=>(2×22×154)/7×10=>96.8cm

Hence

Circumference of circle = 96.8cm

Now

perimeter of two semicircle = 2 × perimeter of semi circle

=>2×perimeter of semi circle =>2× (π ×r)=>2×22/7×154/10=>96.8cm



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