Home
Class 10
MATHS
Mary told her daugher, "seven years ago,...

Mary told her daugher, "seven years ago, I was seven times as old as you were then. Also, three years from now, I shall be three times as old as you will be."Find the present age of Mary and her daughter.

Text Solution

Verified by Experts

The correct Answer is:
Therefore. Mary's present age is 42 years and her daughter's age is 12 years.
Promotional Banner

Topper's Solved these Questions

  • PAIR OF LINEAR EQUATIONS IN TWO VARIABLES

    NCERT TAMIL|Exercise Try This|12 Videos

  • PAIR OF LINEAR EQUATIONS IN TWO VARIABLES

    NCERT TAMIL|Exercise Do This|14 Videos

  • NUMBERS AND SEQUENCES

    NCERT TAMIL|Exercise Unit Exercise - 2 |10 Videos

  • POLYNOMIALS

    NCERT TAMIL|Exercise OPTIONAL EXERCISE [For extensive learning]|6 Videos

Similar Questions

Explore conceptually related problems

Five years ago, a man was seven times as old as his son, while five years hence, the man will be four times as old his son. Find thie present age.

Seven year ago, Varun's age was five times the square of swati's age. Three years hence Swati's age will be two fifth of Varun's age. Find their present ages.

A girl is twice as old as her sister. Five years hence, the product of their ages (in years) will be 375. Find their present ages.

When Rupa was born, her father was 25 years old. Form an equation and draw a graph for this data. From the graph find (i) The age of the father when Rupa is 25 years old. (ii) Rupa’s age when her father is 40 years old.

Vani, her father and her grand father have an average age of 53. One-half of her grand father's age plus one-third of her father's age plus one fourth of Vani's age is 65. Four years ago if Vani's grandfather was four times as old as Vani then how old are they all now?

Take a small stone. Hold it in your hand. We know that the force gravity due to the earth acts on each and every object. When we were holding the stone in our hand, the stone was experiencing this force, but it was balanced by a force that we were applying on it in the opposite direction. As a result, the stone remained at rest. Once we release the stone from our hands the only force that acts on it is the gravitational force of the earth and the stone falls down under its influence. Whenever an object moves under the influence of the force of gravity alone, it is said to be falling freely. Thus the released stone is in a free fall. In free fall, the initial velocity of the object is zero and goes on increasing due to acceleration due to gravity of the earth. During free fall, the frictional force due to air opposes the motion of the object and a buoyant force also acts on the object. Thus, true free fall is possible only in vacuum. For a freely falling object, the velocity on reaching the earth and the time taken for it can be calculated by using Newton's equations of motion. For free fall the initial velocity u=0 and the acceleration a=g . Thus, we can write the equations as v="gt",s=1/2"gt"^(2),v^(2)=2gs For calculating the motion of an object thrown upwards, acceleration is negative, i.e. in a direction opposite to the velocity and is taken to be -g. The magnitude of g is the same but the velocity of the object decreases due to -ve acceleration. The moon and the artificial satellites are moving only under the influence of the gravitational field of the earth. Thus they are in free fall. Which force acts on the stone in free fall after you release it?