R S Aggarwal Solutions for Chapter: Linear Equations in One Variable, Exercise 2: EXERCISE 7B

A father is $30$ years older than his son. In $12$ years, the man will be three times as old as his son. Find their present ages.

After 12 years Manoj will be 3 times as old as he was 4 years ago. Find his present age.

Two supplementary angles differ by $44°.$ Find the angles.

In an isosceles triangle the base angles are equal and the vertex angle is twice of each base angle. Find the measures of the angles of the triangle.

A man travelled $\frac{3}{5}$ of his journey by rail, $\frac{1}{4}$ by a taxi, $\frac{1}{8}$ by a bus and the remaining $2 \mathrm{km}$ on foot. What is the length of his total journey?

A labourer is engaged for $20 days$on the condition that he will receive $₹120$ for each day he works and will be fined $₹10$ for each day he is absent. If he receives $₹1880$ in all, for how many days did he remain absent?

Hari Babu left one-third of his property to his son, one-fourth to his daughter and the remainder to his wife. If his wife's share is $₹18000$, what was the worth of his total property?

How much pure alcohol must be added to $400 mL of a 15\%$solution to make its strength $32\%.$