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10. Direct and Inverse Variable
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Q16 of 41 Page 10

A person has money to buy 25 cycles worth Rs. 500 each. How many cycles he will be able to buy if each cycle is costing Rs. 125 more?

Let the number of cycles be


Increased cost of one cycles is = 500 + 125 = Rs 625














Cost (Rs)



500



625



Number of cycles



25



x






Therefore the number of cycles is 20


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14

55 cows can graze a field in 16 days. How many cows will graze the same field in 10 days?

15

18 men can reap a field in 35 days. For reaping the same field in 15 days, how many men are required?

17

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?

18

If x and y vary inversely as each other and

(i) x = 3 when y = 8, find y when x = 4


(ii) x = 5, when y = 15, find x when y = 12


(iii) x = 30, find y when constant of variation = 900


(iv) y = 35, find x when constant of variation = 7

Questions · 41
10. Direct and Inverse Variable
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