21. Create a flowchart and an algorithm to input Principal, Rate, Time and display total amount.
Algorithm:
Step 1: Start
Step 2: Input Principal, Time and Rate (P, T, R)
Step 3: I = ( P * T * R ) / 100
Step 4: A = P + I
Step 5: Print “ Total Amount “ A
Step 6: Stop/End
Flowchart:

22. Create a flowchart and an algorithm to display Area Of Square.
Algorithm:
Step 1: Start
Step 2: Input Length (L)
Step 3: A = L ^ 2
Step 4: Print “ Area of Square “ A
Step 5: Stop/End
Flowchart:

23. Create a flowchart and an algorithm to display the sum of first n natural numbers.
Algorithm:
Step 1: Start
Step 2: Enter the number (N)
Step 3: S = N * (N + 1) / 2
Step 4: Print ” Sum of “, N, “Numbers is”, S
Step 5: Stop/End
Flowchart:

24.Create a flowchart and an algorithm to ask in number and print the sum square of the first n natural number.
Algorithm:
Step 1: Start
Step 2: Input the number (N)
Step 3: S = N * (N + 1) * (2 * N + 1) / 6
Step 4: Print “ Sum Of Square entered number is “ S
Step 5: Stop/End
Flowchart:

25. Create a flowchart and an algorithm to display total surface area of the hemisphere.
Algorithm:
Step 1: Start
Step 2: Input Radius (R)
Step 3: A = 3 * 3.14 * R ^ 2
Step 4: Print “ Total Surface Area of Hemisphere ” A
Step 5: Stop/End
Flowchart:

26. Create a flowchart and an algorithm to display the area of the circle.
Algorithm:
Step 1: Start
Step 2: Input Radius (R)
Step 3: A = 3.14 * R ^ 2
Step 4: Print “ Area of Circle “ A
Step 5: Stop/End
Flowchart:

27. Create a flowchart and an algorithm to display total surface area and volume of cylinder.
Algorithm:
Step 1: Start
Step 2: Input Radius and Height (R, H)
Step 3: A = 2 * 3.14 * R * ( R + H )
Step 4: V = 3.14 * R ^ 2 * H
Step 5: Print “ Total Surface Area of Cylinder “ A
Step 6: Print “ Volume Of Cylinder “ V
Step 7: Stop/ End
Flowchart:

28. Create a flowchart and an algorithm to ask the user to enter the marks in any four subject and display weather the user is pass or fail.
Algorithm:
Step 1: Start
Step 2: Input marks of any four subjects. (a , b, c, d)
Step 3: total = a + b + c + d
Step 4: avg = total / 4
Step 5: If avg > 40
GoTo Step 6
Else GoTo Step 7
Step 6: Print “ You are Pass”
GoTo Step 8
Step 7: Print “ You are Fail”
Step 8: Stop/End
Flowchart:

29. Create a flowchart and an algorithm to display the volume of the cylinder.
Algorithm:
Step 1: Start
Step 2: Input Radius and Height. (R, H)
Step 3: V = 3.14 * R ^ 2 * H
Step 4: “Volume of Cylinder” V
Step 5: Stop/End
Flowchart:

30. Create a flowchart and an algorithm to display the volume of the hemisphere.
Algorithm:
Step 1: Start
Step 2: Input Radius. ( R )
Step 3: V = ( 2 / 3 ) * 3.14 * R ^ 3
Step 4: Print “ Volume of Hemisphere” V
Step 5: Stop/End
Flowchart:
