EXERCISE 5.2
1) Which fraction of a revolution clockwise does the hour hand of a clock turn through, when it goes from :
(a) 3 to 9
Ans: 1/2
(b) 4 to 7
Ans: 1/4
(c) 7 to 10
Ans: 1/4
(d) 12 to 9
Ans: 3/4
(e) 1 to 10
Ans: 3/4
(f) 6 to 3
Ans: 3/4
2) Where will the hand of a clock stop if it?
(a) Starts at 12 and makes 1/2 of the revolution, clockwise?
Ans: 6
(b) Starts at 2 and makes 1/2 of a revolution, clockwise
Ans: 8
(c) Starts at 5 and makes 1/4 of revolution, clockwise?
Ans: 8
(d) Starts at 5 and make 3/4 of revolution, clockwise?
Ans: 2
3) Which direction will you face if you start facing?
(a) East and make 1/2 of a revolution clockwise?
Ans: West.
(b) East and make 1 1/2 of a revolution clockwise?
Ans: West.
(c) West and make 3/4 of a revolution anti-clockwise?
Ans: North.
(d) South and make one full revolution?
Ans: South.
(To answer (d), it is not required to specify clockwise or anticlockwise direction because one full revolution will bring us back to the original position)
4) What part of a revolution have you turned through if you start facing?
(a) East and turn clockwise to face north.
Ans: 3/4
(b) South and turn clockwise to face east.
Ans: 3/4
(c) West and turn clockwise to face east?
Ans: 1/2
5) Find the number of right angles turned through by the hour hand of a clock when it goes from :
(a) 3 to 6
Ans: 1
(b) 2 to 8
Ans: 2
(c) 5 to 11
Ans: 2
(d) 10 to 1
Ans: 1
(e) 12 to 9
Ans: 3
(f) 12 to 9
Ans: 2
6) How many right angles do you make if you start facing :
(a) South and turn clockwise to west?
Ans: 1
(b) North and turn anti-clockwise to east?
Ans: 3
(c) West and turn west?
Ans: 4
(d) South and turn to north?
7) Where will the hour hand of a clock stop if it starts?
(a) From 6 and turns through 1 right angle?
Ans: 9
(b) From 8 and turns through 2 right angles?
Ans: 2
(c) From 10 and turns through 3 right angles?
Ans: 7
(d) From 7 and turns through 2 straight angles?
Ans: 7