2. Solved Papers
  3. Railways

Railways R.R.C. (Patna) Solved Paper Held on 1st Shift 2-11-2014

  • question_answer
    If the height of a cylinder is increased by 15% and the radius of the base is decreased by 10%, then what per cent will it's curved surface area change

    A) 3.5% decrease   

    B) 3.5% increase

    C) 5% decrease                  

    D) 5% increase

    Correct Answer: B

    Solution :

    It's curved surface area will changed \[=15-10-\frac{10\times 15}{100}\] \[=5-1.5\] \[=3.5%\,\,increase\]


You need to login to perform this action.
You will be redirected in 3 sec spinner