Question 38

State whether the following statement is true (T) or false (F).

A and B are together 90 years old. Hence, the ages of A and B five years back would be (x-5) years and (85-x) years, respectively.

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Solution

True
Let the age of A be x yr.
Then, age of B=(90-x) yr
Five years ago, the age of A=(x-5) yr
The age of B=90-x-5=(85-x) yr
Hence, the ages of A and B five years back would be (x-5) yr and (85-x) yr, respectively.

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Standard VIII Mathematics

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Question 38 State whether the following statement is true (T) or false (F). A and B are together 90 years old. Hence, the ages of A and B five years back would be (x-5) years and (85-x) years, respectively.

True Let the age of A be x yr. Then, age of B=(90-x) yr Five years ago, the age of A=(x-5) yr The age of B=90-x-5=(85-x) yr Hence, the ages of A and B five years back would be (x-5) yr and (85-x) yr, respectively.

Question 38

State whether the following statement is true (T) or false (F).

A and B are together 90 years old. Hence, the ages of A and B five years back would be (x-5) years and (85-x) years, respectively.

True
Let the age of A be x yr.
Then, age of B=(90-x) yr
Five years ago, the age of A=(x-5) yr
The age of B=90-x-5=(85-x) yr
Hence, the ages of A and B five years back would be (x-5) yr and (85-x) yr, respectively.