MCQ
A square shaped park $ABCD$ of side $100m$ has two equal rectangular flower beds each of size $10m \times 5m$ Length of the boundary of the remaining park is:
  • A
    $360m$
  • $400m$
  • C
    $340m$
  • D
    $460m$

Answer

Correct option: B.
$400m$

In order to find the length of the boundary of the remaining park, we add two flower beds each of length 10m and breadth $5m$, then remaining park is shown below:

Now, length of the boundary of the remaining park = Perimeter of remaining park $= (90 + 5 + 10 + 95 + 90 + 5 + 10 + 95)m = 400m$

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