ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

    Question

    On a rectangular wall of length 20 metres and height 21

    metres, there is a window in the shape of triangle surmounted on a square. If the base of triangle and square overlap and length of each side of the square is 6 metres and length of altitude of the triangle is 3 metres, then excluding the window, what is the surface area (in m2) of the wall?
    A 375 Correct Answer Incorrect Answer
    B 325 Correct Answer Incorrect Answer
    C 335 Correct Answer Incorrect Answer
    D 345 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Surface area of the entire wall = length ├Ч height = 20 ├Ч 21 = 420 m2 Surface area of the window = Sum of surface area of the square part + surface area of the triangular part = 62 + (1/2) ├Ч 6 ├Ч 3 = 36 + 9 = 45 m2 So, desired surface area = 420 тАУ 45 = 375 m2

    Practice Next
    More Mensuration Questions

    Relevant for Exams:

    ask-question