Railways NTPC · Mathematics

Geometry, Mensuration and Data

12 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 12 questions

  1. Find the surface area of a sphere of radius 21 cm. (Use pi = 22/7)
  2. Sales (in Rs lakh) of a firm were 330, 310, 215, 415 in 2019, 2020, 2021, 2022 respectively. What was the percentage change in sales from 2020 to 2021, to the nearest whole number?
  3. From a point 300 m from the foot of a tower, the angle of elevation of the top is 30 degrees. What is the height of the tower? (Take √3 = 1.73)
  4. Sales (in Rs lakh) of a firm were 300, 215, 250, 205 in 2019, 2020, 2021, 2022 respectively. What was the percentage change in sales from 2019 to 2020, to the nearest whole number?
  5. Sales (in Rs lakh) of a firm were 245, 250, 300, 285 in 2019, 2020, 2021, 2022 respectively. What was the percentage change in sales from 2019 to 2020, to the nearest whole number?
  6. Sales (in Rs lakh) of a firm were 370, 450, 335, 340 in 2019, 2020, 2021, 2022 respectively. What was the percentage change in sales from 2021 to 2022, to the nearest whole number?
  7. Sales (in Rs lakh) of a firm were 250, 220, 235, 345 in 2019, 2020, 2021, 2022 respectively. What was the percentage change in sales from 2021 to 2022, to the nearest whole number?
  8. What is the area of a triangle with sides 13 cm, 14 cm and 15 cm?
  9. Sales (in Rs lakh) of a firm were 240, 225, 200, 420 in 2019, 2020, 2021, 2022 respectively. What was the percentage change in sales from 2021 to 2022, to the nearest whole number?
  10. Sales (in Rs lakh) of a firm were 295, 315, 370, 300 in 2019, 2020, 2021, 2022 respectively. What was the percentage change in sales from 2020 to 2021, to the nearest whole number?
  11. Sales (in Rs lakh) of a firm were 315, 400, 230, 405 in 2019, 2020, 2021, 2022 respectively. What was the percentage change in sales from 2019 to 2020, to the nearest whole number?
  12. Sales (in Rs lakh) of a firm were 430, 360, 355, 310 in 2019, 2020, 2021, 2022 respectively. What was the percentage change in sales from 2019 to 2020, to the nearest whole number?

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