Question

the cost of 10 pens is Rs.25. then find the cost of 20 pens?

12. A farmer has enough food for 144 ducks for 28 days. If he sells

32 ducks, how long will the food last?
l want with steps​

Answer 1

Answer:

1 no. ans 50

Step-by-step explanation:

1no. if ten pens cost Rs. 25/- then 20 pens means 10×2=20 ,so 20 pens will cost 25×2=50/- .This is the answer

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Answer 2

Answer:

1. The cost of 10 pens = ₹25

Cost of 1 pen = 25 / 10 = 5/2

Cost of 20 pens = 20 × 5/2 = ₹ 50

2. Given : Farmer has enough food to feed 144 ducks for 28 days

Ducks sold = 32

Food for 1 duck = 144 / 28 = 36/7

Remaining ducks = 144-32= 112

112×36/7= 576 days