Question

Girija said as the number of members increases, the amount of rice required will also increase such that the ratio of number of members and the ratio of the amount of rice is the same. Thus, the number of members and amount of rice are in direct proportion

20 kgs of rice is needed for a family of 4 members. How many kgs of rice will be required if the number of members in the house increase to 10 ?

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Answer 1

QUESTION :-

20 kgs of rice is needed for a family of 4 members. How many kgs of rice will be required if the number of members in the house increases to 10 ?

SOLUTION :-

Let x be the amount of rice required for 10 members

Then x:20 = 10:4

Since the product of the means is equal to the product of the extremes :

4x = 20 × 10

x = 20×10/4

x = 50

.°. Amount of rice required for 10 members = 50 kgs

Answer 2

Let,

X = be the amount of rice required

X:20=10:4

so,

4x = 20×10

$x = \frac{20 \times 10}{4}$

x=50

50kgs are required for 10 persons.