Question : Thrice the length of the diameter of a circle is 10 cm less than its circumference. What is the radius of the circle? [Use $\pi=\frac{22}{7}$]
Option 1: 28 cm
Option 2: 14 cm
Option 3: 70 cm
Option 4: 35 cm
New: SSC MTS Tier 1 Answer key 2024 out
Don't Miss: Month-wise Current Affairs | Upcoming Government Exams
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 35 cm
Solution : Given: 3 × Diameter = Circumference – 10 Let the radius be $r$. We know diameter = $2r$ So, $3×2r=2\pi r$ $⇒ 6r = 2× \frac{22}{7} × r - 10$ $⇒ \frac{44}{7}r - 6r = 10$ $⇒ \frac{2r}{7} = 10$ $⇒ r = 35\ \text{cm}$ Hence, the correct answer is 35 cm.
Answer Key | Cutoff | Selection Process | Preparation Tips | Eligibility | Application | Exam Pattern
Question : The sum of the lengths of the radius and the diameter of a circle is 84 cm. What is the difference between the lengths of the circumference and the radius of this circle? [Use $\pi=\frac{22}{7}$]
Question : The diameter of a circle is 42 cm. What is the difference between the lengths of the circumference and the radius of the circle? [Use $\left.\pi=\frac{22}{7}\right]$
Question : The area of a circle is 1386 cm2. What is the radius of the circle? [Use $\pi=\frac{22}{7}$ ]
Question : The area of a circle is 2464 cm2. What is the diameter of this circle? [Use $\pi=\frac{22}{7}$]
Question : The surface area of a sphere is 2464 cm². Find the radius of the sphere. [Use $\pi=\frac{22}{7}$ ]
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile