8th Class
Mathematics
Direct and Inverse Proportions
Question Bank
Direct and Inverse Proportions
question_answer
Raghu has enough money to buy 75 machines worth Rs. 200 each. How many machines can he buy if he gets a discount of Rs. 50 on each machine?
A) 180
B) 200
C) 150
D) 100
Correct Answer:
D
Solution :
Let number of machines be y.
No. of Machines
75
y
Cost of each machine
200
(200-50)=150
More the cost of machines, lesser the number of machines bought. So, it is a case of inverse proportion. Hence, \[75\times 200=y\times 150\] Or \[y=\frac{75\times 200}{150}=100\]