Understanding elementary shapes Ex-5.2

NCERT solutions for Maths Understanding elementary 

NCERT Solutions for Class 6 Maths Understanding elementary

Class –VI

Mathematics

(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

Answer:

(a) $\frac{1}{2}$ or two right angles

(b) $\frac{1}{4}$ or oneright angle

(c) $\frac{1}{4}$ or one right angle

(d) $\frac{3}{4}$ or three right angles.

(e) $\frac{3}{4}$ or three right angles.

(f) $\frac{3}{4}$ or three right angles.

Question 2.Where will the hand of a clock stop if it:

(a)starts at 12 and make $\frac{1}{2}$ of a revolution, clockwise?

(b)starts at 2 and makes $\frac{1}{2}$ of a revolution, clockwise?

(c)starts at 5 and makes $\frac{1}{4}$ of a revolution, clockwise?

(d)starts at 5 and makes $\frac{3}{4}$ of a revolution, clockwise?

Answer: (a) At 6, (b) At 8, (c) At 8, (d) At 2

NCERT Solutions for Class 6 Maths Exercise 5.2

Question 3.Which direction will you face if you start facing:

(a)East and make $\frac{1}{2}$ of a revolution clockwise?

(b)East and make 1$\frac{1}{2}$ of a revolution clockwise?

(c)West and makes $\frac{3}{4}$ of a revolution, clockwise?

(d)South and make one full revolution?

(Should we specify clockwise or anti-clockwise for this last question? Why not?)

Answer: (a) West, (b) West , (c) North, (d) South

(For answer (d), it is immaterial whether we turn clockwise or anticlockwise, 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 facing:

(a)East and turn clockwise to face north?

(b)South and turn clockwise to fase east?

(c)West and turn clockwise to face east?

Answer:

(a) $\frac{3}{4}$

(b) $\frac{3}{4}$

(c) $\frac{1}{2}$

NCERT Solutions for Class 6 Maths Exercise 5.2

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 6

Answer:

(a) One right angle

(b) Two right angles

(c) Two right angles

(d) One right angle

(e) Three right angles

(f) Two right angles

NCERT Solutions for Class 6 Maths Exercise 5.2

Question 6.How many right angles do you make if you start facing:

(a)South and turn clockwise to west?

(b)North and turn anti-clockwise to east?

(c)West and turn to west?

(d)South and turn to north?

Answer:

(a) One right angle

(b) Three right angles

(c) Four right angles

(d) Two right angles

NCERT Solutions for Class 6 Maths Exercise 5.2

Question 7. Where will the hour 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 7 and turns through 2 straight angles?

Answer: (a) At 9, (b) At 2, (c) At 7, (d) At 7