Question
Solution
According to the question, CSA/TSA = 2/5 ⇒ [2πRh]/[2πR(R + h)] = 2/5 ⇒ h/(R + h) = 2/5 ⇒ 5h = 2R + 2h ⇒ h = (2/3)R .......(1) The volume of a cylinder and the volume of a solid hemisphere are equal. ⇒ πR2h = (2/3)πr3 ⇒ R2 × (2/3)R = (2/3) × (21)3 ⇒ R3 = (21)3 ⇒ R = 21 सेमी ∴ The radius of its base (in cm) is 21 cm.
Pipe A and B can fill the pool in 30 minutes and 40 minutes, respectively. Pipe C can empty half filled pool in 30 minutes. If all the pipes are opened ...
Android Operating system is an example of which kind of Source Model?
Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 9 hours, respectively. If pipe ‘C’ is opened along with pipes ‘A’ and ‘B’, then the...
Which of the following statements best describes a journal in accounting?
The book 'Planning and the Poor' was authored by:
Select the number from among the given options that can replace the question mark (?) in the following series:
26, 78, 36, 108, 66, 198, ?
Rs. 7500 is invested in scheme ‘A’ for 3 years and Rs. 6000 is invested in scheme ‘B’ for 2 years. Scheme ‘A’ offers simple interest of 16% ...
A man engaged a servant on the condition that he would pay him 120 and a turban after service of one year. He served only for nine months and received t...
Which Institute has launched a new online training programme called 'Space Science and Technology Awareness Training (START)' for post-graduate and fina...
What is the age limit for availing of the overdraft Facility under the PMJDY?
Relevant for Exams:
