Question 4
In my school, there are 5 teachers and 170 students. The ratio of teachers to students in my school is . Count the number of teachers and students in your school. What is the ratio of teachers to students in your school? Write it below.
- A ratio compares two quantities of the same kind by division, expressed in the form .
- The ratio of teachers to students is given by .
- This is an activity-based question where the counts depend on your specific school. An illustrative example with teachers and students is shown below.
Step 1 · Count Teachers and Students
Let the count of teachers and students in the school be:
Step 2 · Form and Simplify the Ratio
The ratio of teachers to students is
Dividing both terms by their greatest common factor ()
(Answers may vary depending on the actual count in your school)
- Reversing the Terms: Writing () instead of (). Always maintain the exact order asked in the question.
- Leaving in Unsimplified Form: Writing without simplifying it to its simplest form () by dividing by the greatest common factor.
More questions in IT
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Can you check by what factors the width and height of image D change as compared to image A? Are the factors the same?
By what factor should we multiply the ratio (image A) to get (image D)?
In my school, there are 5 teachers and 170 students. The ratio of teachers to students in my school is . Count the number of teachers and students in your school. What is the ratio of teachers to students in your school? Write it below.
Is the teacher-to-student ratio in your school proportional to the one in my school?
Measure the width and height (to the nearest cm) of the blackboard in your classroom. What is the ratio of width to height of the blackboard?
Can you draw a rectangle in your notebook whose width and height are proportional to the ratio of the blackboard?
Compare the rectangle you have drawn to those drawn by your classmates. Do they all look the same?
Context: Manjunath usually mixes of coffee decoction with of milk to make filter coffee (ratio ). For 'stronger' coffee, he mixes of decoction with of milk (ratio ).
Q. Why is this coffee stronger?
Context: Manjunath usually mixes of coffee decoction with of milk to make filter coffee (ratio ). For 'lighter' coffee, he mixes of coffee and of milk, making the ratio .
Q. Why is this coffee lighter?
The following table shows the different ratios in which Manjunath mixes coffee decoction with milk. Write in the last column if the coffee is stronger or lighter than the regular coffee.
Does the drawing look more realistic if the ratios are proportional? Why? Why not?
Puneeth’s father went from Lucknow to Kanpur in 2 hours by riding his motorcycle at a speed of 50 km/h. If he drives at 75 km/h, how long will it take him to reach Kanpur? Can we form this problem as a proportion—
Would it take Puneeth’s father more time or less time to reach Kanpur? Think about it.
Context: The volume of a sachet is 6 mL and its price is ₹2. The volume of a small bottle is 180 mL and its price is ₹154. The ratio of the volume of a sachet to a small bottle is . The ratio of their prices is .
Q. Why do you think that the ratio of the prices is not proportional to the ratio of the volumes?
Context: You have 12 countable objects or counters to share between the two of you.
Q. If you divide them equally, what is the ratio of the number of counters with each of you?
Context: You have 12 countable objects or counters to share between the two of you.
Q. If your partner gets 5 counters, how many objects will you get? What is the ratio of the counters?
