Multiple choice general knowledge math & puzzles

The sides of a triangle are 5, 12 and 13 units respectively. A rectangle is constructed which is equal in area to the triangle and has a width of 10 units. Then the perimeter of the rectangle is

  1. 30

  2. 26

  3. 13

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The triangle is a right triangle (5-12-13). Area = 0.5 * 5 * 12 = 30. A rectangle with area 30 and width 10 must have length 3 (30/10). The perimeter of the rectangle is 2 * (length + width) = 2 * (10 + 3) = 26.