Selina Textbook Solutions: Direct and Inverse Variations | Mathematics Class 8 ICSE PDF Download

 Page 1


10. Direct and Inverse Variations 
EXERCISE 10(A) 
Question 1. 
In which ofthe following tables, x and y vary directly: 
 
Solution: 
Page 2


10. Direct and Inverse Variations 
EXERCISE 10(A) 
Question 1. 
In which ofthe following tables, x and y vary directly: 
 
Solution: 
 
Question 2. 
If x and y vary directly, find the values of x, y and z: 
 
Solution: 
Page 3


10. Direct and Inverse Variations 
EXERCISE 10(A) 
Question 1. 
In which ofthe following tables, x and y vary directly: 
 
Solution: 
 
Question 2. 
If x and y vary directly, find the values of x, y and z: 
 
Solution: 
 
 
Question 3. 
A truck consumes 28 litres of diesel for moving through a distance of 448 km. How 
much distance will it cover in 64 litres of diesel? 
Solution: 
 
Question 4. 
For 100 km, a taxi charges Rs.  1,800. How much will it charge for a journey of 120 km? 
Page 4


10. Direct and Inverse Variations 
EXERCISE 10(A) 
Question 1. 
In which ofthe following tables, x and y vary directly: 
 
Solution: 
 
Question 2. 
If x and y vary directly, find the values of x, y and z: 
 
Solution: 
 
 
Question 3. 
A truck consumes 28 litres of diesel for moving through a distance of 448 km. How 
much distance will it cover in 64 litres of diesel? 
Solution: 
 
Question 4. 
For 100 km, a taxi charges Rs.  1,800. How much will it charge for a journey of 120 km? 
Solution: 
 
Question 5. 
If 27 identical articles cost Rs. 1,890, how many articles can be bought for Rs.  1,750? 
Solution: 
 
Question 6. 
7 kg of rice costs Rs. 1,120. How much rice can be bought for Rs. 3,680? 
Page 5


10. Direct and Inverse Variations 
EXERCISE 10(A) 
Question 1. 
In which ofthe following tables, x and y vary directly: 
 
Solution: 
 
Question 2. 
If x and y vary directly, find the values of x, y and z: 
 
Solution: 
 
 
Question 3. 
A truck consumes 28 litres of diesel for moving through a distance of 448 km. How 
much distance will it cover in 64 litres of diesel? 
Solution: 
 
Question 4. 
For 100 km, a taxi charges Rs.  1,800. How much will it charge for a journey of 120 km? 
Solution: 
 
Question 5. 
If 27 identical articles cost Rs. 1,890, how many articles can be bought for Rs.  1,750? 
Solution: 
 
Question 6. 
7 kg of rice costs Rs. 1,120. How much rice can be bought for Rs. 3,680? 
Solution: 
 
Question 7. 
6 note-books cost Rs. 156, find the cost of 54 such note-books. 
Solution: 
 
Question 8. 
22 men can dig a 27 m long trench in one day. How many men should be employed for 
digging 135 m long trench of the same type in one day? 
Solution: 
 
Question 9. 
If the total weight of 11 identical articles is 77 kg, how many articles of the same type 
would weigh 224 kg? 
Solution: