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

    Question

    A triangular plot of land has sides 15 m, 20 m, and 25

    m. Find its area and the cost of fencing it along all sides at Rs 80 per metre
    A Area = 150 m²; Fencing cost = Rs 4800 Correct Answer Incorrect Answer
    B Area = 250 m²; Fencing cost = Rs 2800 Correct Answer Incorrect Answer
    C Area = 350 m²; Fencing cost = Rs 4870 Correct Answer Incorrect Answer
    D Area = 100 m²; Fencing cost = Rs 3808 Correct Answer Incorrect Answer

    Solution

    Check right angle: 15² + 20² = 225 + 400 = 625 = 25². So it is a right-angled triangle with perpendicular sides 15 m and 20 m. Area = (1/2) × base × height = (1/2) × 15 × 20 = 150 m² Perimeter = 15 + 20 + 25 = 60 m Cost of fencing = 60 × 80 = Rs 4800 Answer: Area = 150 m²; Fencing cost = Rs 4800.

    Practice Next
    More Triangle Questions

    Relevant for Exams:

    ask-question