which of the following quantities are inverse proportion state the assumpution made in each case the number of concern for farhan buys and the total cost of pencils.
Answers
Step-by-step explanation:
If the cost of 1 kg of sugar is Rs 18, then what would be the cost of 3 kg sugar? It is Rs 54.
Similarly, we can find the cost of 5 kg or 8 kg of sugar. Study the following table.
Observe that as weight of sugar increases, cost also increases in such a manner that their ratio remains constant.
Take one more example. Suppose a car uses 4 litres of petrol to travel a distance of 60 km. How far will it travel using 12 litres? The answer is 180 km. How did we calculate it? Since petrol consumed in the second instance is 12 litres, i.e., three times of 4 litres, the distance travelled will also be three times of 60 km. In other words, when the petrol consumption becomes three-fold, the distance travelled is also three fold the previous one. Let the consumption of petrol be x litres and the corresponding distance travelled be y km . Now, complete the following table: