Find the area of circle whose radius is 7m?
Correct answer: B. 154 sq m
- A. 124 sq m
- B. 154 sq m
- C. 145 sq m
- D. 167 sq m
Explanation
The area of a circle is πr², so A = (22/7) x 7 m x 7 m = 154 m². Therefore option b is correct. The likely mistake is option a, which can result from using an incorrect value of π or an arithmetic error.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Area and Volume
Area measures the surface enclosed by two-dimensional figures, while volume measures the space occupied by three-dimensional solids. Problems use formulas for rectangles, triangles, circles, prisms, cylinders, cones, spheres, and composite figures, including unit conversion and the distinction between surface area, lateral area, and volume.
Practise Geometry
222 free Geometry MCQs from Mathematics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Mathematics questions like this
Mathematics is on 76 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Area and Volume questions
Find the cost of fencing around a circular field of diameter 28 m at the rate of Rs.1.50 a meter?
A rope of which a calf is tied is increased from 12 m to 23 m, how much additional grassy ground shall it graze?
The radius of a semi circle is 6.3 cm then its perimeter is?
The cross-section of a cannel is a trapezium in shape. If the cannel is 10 m wide at the top and 6 m wide at the bottom and the area of cross-section is 640 sq m, the depth of cannel is_________?
The area of a parallelogram is 128sq m and its altitude is twice the corresponding base. Then the length of the base is_________?
The perimeter of a rhombus is 68 cm and one of its diagonals is 16 cm. Find its area?