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CuriousTab

Area problems


  • 1. ?ABC is right angled at B. BD is an altitude. AD = 9 cm and DC = 16 cm. What is the value of BD (in cm)?

  • Options
  • A. 6
  • B. 18
  • C. 21
  • D. 12
  • Discuss
  • 2. ? DEF is right angled at E. If m?D = 30°, what is the length of DE (in cm), if EF = 6?3 cm?

  • Options
  • A. 18
  • B. 12?3
  • C. 18?3
  • D. 12
  • Discuss
  • 3. What is the area (in sq cm) of a rhombus if the lengths of the diagonals are 12 cm and 14 cm?

  • Options
  • A. 42
  • B. 168
  • C. 84
  • D. 63
  • Discuss
  • 4. What is the area (in sq cm) of an equilateral triangle of side 14 cm?

  • Options
  • A. 49?3
  • B. 98?3
  • C. (49/2)?3
  • D. (49/4)?3
  • Discuss
  • 5. Point P is the midpoint of segment AB. Co-ordinates of P are (3 , 1) and B are (5, -4). What are the co-ordinates of point A?

  • Options
  • A. (-1 , 7)
  • B. (1 , -7)
  • C. (1 , 6)
  • D. (-1 , -7)
  • Discuss
  • 6. What is the area (in sq cm) of a rectangle if its diagonal is 25 cm and one of its sides is 24 cm?

  • Options
  • A. 186
  • B. 144
  • C. 132
  • D. 168
  • Discuss
  • 7. Area of 4 walls of a cuboid is 57 sq m, if its length is 5.5 m and height is 3 m. What is its breadth (in m)?

  • Options
  • A. 4.5
  • B. 4
  • C. 3
  • D. 3.5
  • Discuss
  • 8. The height of an equilateral triangle is 18 cm. Its area is

  • Options
  • A. 36√3 sq. m.
  • B. 108√3 sq. cm.
  • C. 108 sq. cm.
  • D. 96√3 sq. m.
  • Discuss
  • 9. The sides of a triangle are in the ratio 1/2 : 1/3 : 1/4 and its perimeter is 104 cm. The length of the longest side (in cm) is

  • Options
  • A. 52
  • B. 48
  • C. 32
  • D. 26
  • Discuss
  • 10. The four walls and ceiling of a room of length 25 m, breadth 12 m and height 10 m are to be painted. Painter A can paint 200 m2 in 5 days, Painter B can paint 250 m2 in 2 days. If A and B work together, they will finish the job in

  • Options
  • A. 6 days
  • B. 6 10/33 days
  • C. 7 10/33 days
  • D. 8 days
  • Discuss

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