NCERT Class 8 Mathematics Solutions: Chapter 13 – Direct and Inverse Proportions Exercise 13.2 Part 3
Glide to success with Doorsteptutor material for IMO-Level-2 Class-8: Get full length tests using official NTA interface: all topics with exact weightage, real exam experience, detailed analytics, comparison and rankings, & questions with full solutions.
Download PDF of This Page (Size: 239K) ↧
1. If a box of sweets is divided among children, they will get sweets each. How many would each get, if the number of the children is reduced by ?
Answer:
Each child gets sweets
Children will get
sweets
Total number of sweets
If the number of children is reduced by , then children left
Now,
Each child will get sweets
sweets
2. A farmer has enough food to feed animals in his cattle for days. How long would the food last if there were more animals in his cattle?
Answer:
Consider,
The number of days be .
Total number of animals
Animals | ||
Days |
Here,
The number of animals and the number of days are in inverse proportion.
So, the food will last for four days.
3. A contractor estimates that persons could rewire Jasminder’s house in days. If, he uses persons instead of three, how long should they take to complete the job?
Answer:
Consider,
Time taken to complete the job be .
Persons | ||
Days |
The number of persons and the number of days are in inverse proportion.
days
So, they will complete the job in 3 days.
2. A batch of bottles was packed in boxes with bottles in each box. If the same batch is packed using bottles in each box, how many boxes would be filled?
Answer:
Consider, the number of boxes be .
No. of bottles in each box | ||
Boxes |
The number of bottles and the number of boxes are in inverse proportion.
So, boxes would be filled.