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

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

NCERT TEXTBOOK EXERCISES

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) $\frac { 1 }{ 2 }$ of a revolution
(b) $\frac { 1 }{ 4 }$ of a revolution
(c) $\frac { 1 }{ 4 }$ of a revolution
(d) $\frac { 3 }{ 4 }$ of a revolution
(e) $\frac { 3 }{ 4 }$ of a revolution
(f) $\frac { 3 }{ 4 }$ 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) $\frac { 3 }{ 4 }$ of a revolution.
(b) $\frac { 3 }{ 4 }$ of a revolution.
(c) $\frac { 1 }{ 2 }$ 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 hourâ€™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 a clockwise direction here).

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

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