📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

    Question

    The length of a rectangle, area of which is 105

    cm2, is equal to the radius of a circle of area 1386 cm2. Find the perimeter of the rectangle?
    A 74 cm Correct Answer Incorrect Answer
    B 52 cm Correct Answer Incorrect Answer
    C 22 cm Correct Answer Incorrect Answer
    D 50 cm Correct Answer Incorrect Answer
    E 42 cm Correct Answer Incorrect Answer

    Solution

    Let the radius of the circle = r  Area of circle = 1386 = 22/7 × r × r  ⇒ r = 21 cm  Area of rectangle = 105 = L × B = 28 × B  ⇒ B = 5 cm  Perimeter = 2 × (L + B) = 2 × (21 + 5) = 52 cm  

    Practice Next
    More Mensuration Questions