Question:

The inner and outer radius of a ring-shaped iron sheet of thickness 1 cm is 8 cm and 10 cm respectively. When it is melted to make a solid iron ball, its diameter will be 1 cm

Updated On: Jun 30, 2024

3 cm
6 cm
12 cm
18 cm

Hide Solution

Verified By Collegedunia

The Correct Option is B

Solution and Explanation

The correct option is (B): 6 cm

Was this answer helpful?

0

2

Top Questions on types of differential equations

Let the system of equations \(x+2y+3z = 5\), \(2x+3y+z = 9\), \(4x+3y+λz = μ\) have an infinite number of solutions. Then \(λ + 2μ\) is equal to
- JEE Main - 2024
- Mathematics
- types of differential equations
View Solution
let D_k=\(\begin{vmatrix} 1 & 2k& 2k-1\\ n & n^2+n+2 & n^2\\ n & n^2+n & n^2+n+2 \end{vmatrix}\) if \(∑^n_{ k=1}\) D_k=96, Then n is equal to
- JEE Main - 2023
- Mathematics
- types of differential equations
View Solution
Let g(x) = f(x) + f(1 - x) and f''(x) > 0, x ∈ (0,1). If g is decreasing in the interval (0, α) and increasing in the interval (α, 1), then tan-1 (2α) + tan^-1 (\(\frac{1}{α}\)) + tan^-1\( (\frac{α+1}{α})\) is equal to
- JEE Main - 2023
- Mathematics
- types of differential equations
View Solution
In the figure, θ₁ + θ₂ = \(\frac{π}{2}\) and √3 (BE) = 4 (AB). If the area of ΔCAB is 2√3 - 3 unit2 , when \(\frac{θ_2}{θ_1}\) is the largest, then the perimeter (in unit) of ΔCED is equal to ________.
- JEE Main - 2023
- Mathematics
- types of differential equations
View Solution
\(max\\{0≤x≤π}\) \(\{x−2\,\, sin. x \,\,cos+\frac{1}{3} sin\,\, 3x \}=\)
- JEE Main - 2023
- Mathematics
- types of differential equations
View Solution

View More Questions

Questions Asked in WBJEE JENPAS UG exam

View More Questions