Mensuration (Railway Maths) (Part – IX)

Total Questions: 50

11. If the circumference and area of a circle are numerically equal then the radius of the circle is: [RRB NTPC 01/04/2021 (Morning)]

Correct Answer: (b) 2 units
Solution:

Circumference and Area of a circle are numerically equal.
⇒ π𝑅²= 2π𝑅 ⇒ 𝑅 = 2 𝑢𝑛𝑖𝑡

12. A rectangular box has sides 3, 4 and 5 cm. What will be the maximum length of a stick that can be placed inside the box? [RRB NTPC 01/04/2021 (Evening)]

Correct Answer: (d) 5√2 cm
Solution:

13. The area of a circle is equal to the area of a square. What is the ratio of the circumference of the circle to the perimeter of the square? [RRB NTPC 01/04/2021 (Evening)]

Correct Answer: (b) √π : 2
Solution:

14. A spherical ball of 12 cm diameter is melted and cast into a cone, the base of which has a diameter of 8 cm. What is the height of the cone? [RRB NTPC 01/04/2021 (Evening)]

Correct Answer: (c) 54 cm
Solution:

15. A hemispherical bowl of internal radius of 12 cm contains a Liquid. This liquid is to be filled into conical shaped small bottles of base diameter 3 cm and height 4 cm. How many same types of bottles will be needed to empty the bowl? [RRB NTPC 03/04/2021 (Morning) ]

Correct Answer: (b) 384
Solution:

16. The perimeters of two squares are 48 cm and 60 cm. Find the perimeter of a third square whose area is equal to the difference of the area of the squares. [RRB NTPC 03/04/2021 (Morning) ]

Correct Answer: (c) 36 cm
Solution:

17. The Capacity of a cylindrical tank is 38,500 litres. If the height is 4 metres, then what is the diameter of the base? [RRB NTPC 03/04/2021 (Morning) ]

Correct Answer: (b) 3.5 m
Solution:

18. Find the answer of given question? [RRB NTPC 03/04/2021 (Morning) ]

Correct Answer: (b) 6 m
Solution:

19. In a quadrilateral, the length of one of its diagonals is 23 cm and the perpendiculars drawn on this diagonal from other two vertices measure 17 cm and 7 cm respectively. Find the area of the quadrilateral. [RRB NTPC 03/04/2021 (Evening)]

Correct Answer: (a) 276 cm²
Solution:

20. Find the area of the greatest square that can be inscribed in a circle of circumference 44 cm. [RRB NTPC 03/04/2021 (Evening)]

Correct Answer: (d) 98 cm²
Solution: