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Computer Science For Class X
Unit 01: Problem Solving And Algorithm Designing
LAB ACTIVITIES
1. Design an algorithm to find the greater number by taking two numbers as input.
Ans: Greater Number By Taking two numbers
- Step 1: Start
- Step 2: Declare variable num1 , num2 & result
- Step 3: Read num1 and num2
-
Step 4: Check If numl>num2 then print "Result = Number 1 is greater"
Else print "Result = Number 2 is greater" - Step 5: Stop
OR
- Step 1: Start
- Step 2: Read a, b
-
Step 3: If a > b then
Display “A is the largest number”,
otherwise
Display “B is the largest number”, - Step 4: Stop.
2) Design an algorithm to find area of a triangle.
Ans: Area Of A Triangle
- Step 1: Start
- Step 2: Declare variable Base, Height & Area of triangle
- Step 3: Read Base and Height
- Step 4: Use formula Area of triangle = (1/2)*Base*Height
- Step 5 : Display Area of triangle
- Step 6: Stop
OR
- Step 1: Start
- Step 2: Input base, height
- Step 3: Calculate area = ½ * base * height
- Step 4: Display “Area of Triangle =“ area
- Step 5: Stop
3. Sort the following steps of the algorithm in correct order for baking a cake:
Step: Gather the ingredients
Step: End
Step: Grease a pan
Step: Preheat the oven
Step: Put the pan in the oven
Step: Start
Step: Pour the batter into the pan
Step: When the timer goes off, take the pan out of the oven
Step: Set a timer
Step: Mix together the ingredients to make the batter
Ans: Baking A Cake
- Step l: Start
- Step 2: Gather the ingredients
- Step 3: Mix together the ingredients to make the batter
- Step 4: Grease a pan
- Step 5: Pour the batter into the pan
- Step 6: Preheat the oven
- Step 7: Put the pan in the oven
- Step 8: Set a timer
- Step 9: When the timer goes off, take the pan out of the oven
- Step 10: End
4. Draw a flow chart to calculate gross salary by adding 20% house rent and 30% medical allowances in basic salary.
Ans: Gross Salary Flowchart
OR
5. Draw a flow charts for all the algorithms given in this unit.
Ans:
Algorithm 1: Making a cup of tea
- Step 1: Start
- Step 2: Place the fresh water in a pot or a kettle.
- Step 3: Boil the water.
- Step 4: Put the black tea leaves in that pot.
- Step 5: After that add some milk into that pot.
- Step 6: Add some sugar.
- Step 7: Boil for some time.
- Step 8: Stop
Flowchart 1: Making a cup of tea
Algorithm 2: Sum of two numbers
- Step 1: Start
- Step 2: Declare variables num1, num2 and sum.
- Step 3: Read values num1 and num2.
-
Step 4: Add num1 and num2 and assign the result to sum.
sum = num1 + num2 - Step 5: Display sum
- Step 6: Stop
Flowchart 2: Sum of two numbers
OR
Algorithm 3: Average of three numbers
- Step 1: Start
- Step 2: Declare variables num1, num2, num3 and avg.
- Step 3: Read values num1, num2 and num3.
-
Step 4: Apply formula {Average = Sum / No. of values}
avg = (num1 + num2 + num3) / 3 - Step 5: Display avg
- Step 6: Stop
Flowchart 3: Average of three numbers
OR
Algorithm 4: Volume of a box
- Step 1: Start
- Step 2: Declare variables length, width, height and volume.
- Step 3: Read values length, width and height.
-
Step 4: Apply formula {Volume = length x width x height}
volume = length x width x height - Step 5: Display volume
- Step 6: Stop
Flowchart 4: Volume of a box
OR
Algorithm 5: Percent Calculate
- Step 1: Start
- Step 2: Declare variables part, total and percentage.
- Step 3: Read values part and total.
-
Step 4: Apply formula {Percentage = (part / total) x 100}
percentage = (part / total) x 100 - Step 5: Display percentage
- Step 6: Stop
Flowchart 5: Percent Calculate
OR
6. Draw the following structure
a. Tree with six nodes.
b. Graph with five nodes.
Ans: TREE WITH SIX NODES:
OR
GRAPH WITH FIVE NODES
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