IKMC 2007 - Grades 9-10 - Self-study Question 15

Question 15

A 10 m rope is fastened to a corner of a 6 m by 4 m house as shown. A dog is at the other end. Find the perimeter of the accessible area.

Question illustration

$20\pi$
$22\pi$
$40\pi$
$88\pi$
$100\pi$