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NCERT Class 8 Mathematics Solutions: Chapter 2 β Linear Equations in One Variable Exercise 2.2 Part 4
Question: 8 Three consecutive integers are such that when they are taken in increasing order and multiplied by 2,3 and 4 respectively, they add up to 74. Find these numbers.
Answer:
Let the three number consecutive integers be and
According to the question
Hence, first integer
Second integer and third integer
Question: 9 The ages of Rahul and Haroon are in the ratio 5: 7. Four years later the sum of their ages will be 56 years. What are their present ages?
Answer:
Let the present ages of Rahul and Haroon be 5x years and 7x years respectively.
According to condition
Hence, present age of Rahul year and Present age of Haroon =
Question: 10 The number of boys and girls in a class are in the ratio 7: 5. The number of boys is 8 more than the number of girls. What is the total class strength?
Answer:
Let the number of girls be .
Then, the number of boys = .
According to the question,
Hence the number of girls and number of boys