Ncert Solutions Chapter 5 Understanding Elementary Shapes Ex 5.2 Ncert Class 6 Maths Chapter 5 Exercise 5.2 Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise 5.2 Ex 5.2 Class 6 Ncert

## NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Ex 5.2

Question 1.

What fraction of a clockwise revolution does the hour hand of a clock turn through, when it goes from

**(a)** 3 to 9

**(b)** 4 to 7

**(c)** 7 to 10

**(d)** 12 to 9

**(e)** 1 to 10

**(f)** 6 to 3?

Solution :

**(a)** 12 of a revolution

**(b)** 14 of a revolution

**(c)** 14 of a revolution

**(d)** 34 of a revolution

**(e)** 34 of a revolution

**(f)** 34 of a revolution.

Question 2.

Where will the hand of a clock stop, if it

**(a)** starts at 12 and makes 1/2 of a revolution, clockwise?

**(b)** starts at 2 and makes 1/2 of a revolution, clockwise?

**(c)** starts at 5 and makes 1/4 of a revolution, clockwise?

**(d)** starts at 5 and makes 3/4 of a revolution, clockwise?

Solution :

**(a)** at 6

**(b)** at 8

**(c)** at 8

**(d)** at 2.

Question 3.

Which direction will you face if you start facing

**(a)** east and make 1/2 of a revolution clockwise?

**(b)** east and make 1/2 of a revolution clockwise?

**(c)** west and make 3/4 of a. revolution anti-clockwise?

**(d)** south and make one full revolution? (Should we specify clockwise or anti-clockwise for this last question? Why not?)

Solution :

**(a)** West

**(b)** West

**(c)** North

**(d)** South.

To answer **(d)**, it is immaterial whether we turn clockwise or anti-clockwise because one full revolution will bring us back to the original position.

Question 4.

What part of a revolution have you turned through if you stand to face

**(a)** east and turn clockwise to face north?

**(b)** south and turn clockwise to face east?

**(c)** west and turn clockwise to face east?

Solution :

**(a)** 34 of a revolution.

**(b)** 34 of a revolution.

**(c)** 12 of a revolution.

Question 5.

Find the number of right angles turned through by the hour hand of a clock when it goes from

**(a)** 3 to 6

**(b)** 2 to 8

**(c)** 5 to 11

**(d)** 10 to 1

**(e)** 12 to 9

**(f)** 12 to 9

Solution :

**(a)** 1 right angle

**(b)** 2 right angles

**(c)** 2 right angles

**(d)** 1 right angle

**(e)** 3 right angles

**(f)** 2 right angle

Question 6.

Now many right angles do you make if you start facing

**(a)** south and turn clockwise to the west?

**(b)** north and turn anti-clockwise to the east?

**(c)** west and turn to west?

**(d)** south and turn to the north?

Solution :

**(a)** 1 right angle

**(b)** 3 right angles

**(c)** 4 right angles

**(d)** 2 right angles

**(clockwise or anticlockwise).**

Question 7.

Where will the hour’s hand of a clock stop if it starts

**(a)** from 6 and turns through 1 right angle?

**(b)** from 8 and turns through 2 right angles?

**(c)** from 10 and turns through 3 right angles?

**(d)** from 7and turns through 2 straight angles?

Solution :

**(a)** 9

**(b)** 2

**(c)** 7

**(d)** 7.

**(We should consider only clockwise direction here).**