Question

if for
1 rs. 1 horse
1 rs. 8 camel
10 rs. 1 elephant

then buy 100 animals in 100 rupees with using all given animals ​

Answer 1

Topic - Finding Animals

Given:

• 1 Rs. --- 1 horse
• 1 Rs. --- 8 camels
• 10 Rs. --- 1 elephant

To find: the number of animals in such a way that sum of the number of animals be 100 and the total price be Rs. 100

Solution:

Let,

• Number of horses = x
• Number of elephants = y
• Number of camels = 100 - x - y

Then, we can form an equation for total price:

• x + 10y + (100 - x - y)/8 = 100
• or, 8x + 80y + 100 - x - y = 800
• or, 7x + 79y = 700

We have found one equation with two unknown variables and thus we cannot solve it with a direct method.

We use trial and error to find integral values of x and y:

x y

21 7

Answer:

Horses Camels Elephants

21 72 7

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