Page 241 - ComputerScience_Class_11

10. Write a Java program to print the following using a switch case.
a. ***** b. *
**** * *
*** * * *
*** * * * *
** * * * * *
* * * * *
* * *
* *
*
11. Write a menu-driven program in Java to input a number and check whether it is a Kaprekar number or a Fascinating number.
• A number is called Capricorn or Kaprekar number whose square is divided into two parts in any conditions and parts are added,
the sum of the parts is equal to the number itself.
Example: 45
2
45 = 45 = 2025
Combinations of the parts of 2025 and their sum:
202 + 5 = 207 (not 45)
20 + 25 = 45
2 + 025 = 27 (not 45)
Here, we can see that one combination is equal to the number itself. So, 45 is a Capricorn or Kaprekar number.
• A number is a Fascinating number when the number is multiplied by 2 and 3 and is concatenated with both the products, then
all the digits from 1 to 9 are present exactly once, regardless of the number of zeroes.
Example:
Consider the number 192
192 x 1 = 192
192 x 2 = 384
192 x 3 = 576
Concatenating the results: 192 384 576
Here, we can see that '192384576' consists of all digits from 1 to 9 exactly once. So, 192 is a Fascinating number.
12. Write a Java program to compute the railway fare depending on the given criteria as follows:

Age (in years) Distance (in kms) Fare (in rupees)
Below 10 Below 10 5
Between 10 and 50 20
Above 50 50
Between 10 and 60 Below 10 10
Between 10 and 50 40
Above 50 80
Above 60 Below 10 4
Between 10 and 50 15
Above 50 35
13. The volume of solids, viz. cuboid, cylinder and cone can be calculated by the following formula:
Volume of a cuboid (v = l*b*h) - if choice is 1
2
Volume of a cylinder (v = π*r *h) - if choice is 2
2
Volume of a cone (v = (1/3)*π*r *h) - if choice is 3
Using a switch case statement, write a Java program to find the volume of different solids by taking suitable variables and
data types.

Statements and Scope 239