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  • Question
  • The sides of a right-angled triangle are 12 cm, 16 cm, 20 cm respectively. A new right angle Δ is made by joining the midpoints of all the sides. This process continues for infinite then calculate the sum of the areas of all the triangles so made.


  • Options
  • A. 312 sq.cm
  • B. 128 sq.cm
  • C. 412 sq.cm
  • D. 246 sq.cm

  • Correct Answer
  • 128 sq.cm 


  • Area problems


    Search Results


    • 1. The area of the circle is 220 sq.m, the area of the square inscribed in a circle will be

    • Options
    • A. 49
    • B. 70
    • C. 140
    • D. 150
    • Discuss
    • 2. Find the area of the trapezium, whose parallel sides are 12 cm and 10 cm, and distance between the parallel sides is 14 cm?

    • Options
    • A. 121 sq.com
    • B. 154 sq.com
    • C. 186 sq.com
    • D. 164 sq.com
    • Discuss
    • 3. Square units 13 by 9 of an office area is

    • Options
    • A. 97
    • B. 117
    • C. 107
    • D. 127
    • Discuss
    • 4. Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 9856 sq meters.

    • Options
    • A. 56m
    • B. 16m
    • C. 14m
    • D. 76m
    • Discuss
    • 5. The area of a circle of radius 5 is numerically what percent its circumference?

    • Options
    • A. 150%
    • B. 250%
    • C. 350%
    • D. 450%
    • Discuss
    • 6. The difference between two parallel sides of a trapezium is 4 cm. perpendicular distance between them is 19 cm. If the area of the trapezium is 475 find the lengths of the parallel sides.

    • Options
    • A. 27 and 23
    • B. 24 and 23
    • C. 25 and 23
    • D. 22 and 23
    • Discuss
    • 7. The length of a rectangular plot is 20 metres more than its breadth. If the cost of fencing the plot @ 26.50 per metre is Rs. 5300, what is the length of the plot in metres?

    • Options
    • A. 40
    • B. 20
    • C. 30
    • D. none of these
    • Discuss
    • 8. A room is 15 feet long and 12 feet broad. A mat has to be placed on the floor of the room leaving 1.5 feet space from the walls. What will be the cost of the mat at the rate of Rs. 3.50 per squire feet?

    • Options
    • A. 378
    • B. 472.5
    • C. 496
    • D. 630
    • Discuss
    • 9. Find the ratio of the areas of the incircle and circumcircle of a square.

    • Options
    • A. 1:1
    • B. 1:2
    • C. 1:3
    • D. 1:4
    • Discuss
    • 10. The perimeter of a rectangle whose length is 6 m more than its breadth is 84 m. What will be the area of the rectangle?

    • Options
    • A. 333 sq.mts
    • B. 330 sq.mts
    • C. 362 sq.mts
    • D. 432 sq.mts
    • Discuss


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