Question

there are 20 peoples and 20 roti .men eats 4 rotis women eats 1/2 roti and child 1/4 roti how many men , women , child

Answer 1

Given: a man eats 4 rotis, an woman eats 1/2 roti and a child eats 1/4 roti

To find: the number of men, women and children

Solution: Let the number of men and women by x and y respectively. Then the number of children be 20 - (x + y).

Total number of rotis = 20

Then, 4x + 1/2 * y + 1/4 * (20 - x - y) = 20

or, 16x + 2y + 20 - x - y = 80

or, 15x + y = 60

or, y = 60 - 15x

This is the only linear equation with two variables x and y, for which the solution has to be found using assumptions.

• When x = 1, y = 45 (> 20)
• When x = 2, y = 30 (> 20)
• When x = 3, y = 15 (< 20)
• When x = 4, y = 0

Only valid solution is x = 3, y = 15.

Then 20 - (3 + 15) = 20 - 18 = 2

Answer:

Men Women Children

3 15 2

Answer 2

Answer:

men. women. kida

3. 15. 2