Question

Two clocks A and B are shown in Figure. Clock A has an hour and a minute hand, whereas clock B has an hour hand, a minute hand as well as a second hand. Which of the following statement is correct for these clocks?

(A) (B)

Answer 1

The correct option is C

A time interval of 5 minutes can be measured by both A and B.

Clock A has only a minute hand, and an hour hand. Whereas. clock B has an hour hand, minute hand, and second hand.

Consider measuring 30 seconds

1. Since clock B has a second hand, 30 seconds can easily be measured using clock B.
2. Clock A does not have any second hand, so times in seconds cannot be measured by it.
3. Hence, option (A) is incorrect.
4. Again, option (B) is also incorrect.

Consider measuring 5 minutes

1. Since clock A has a minute hand, 5 minutes can be measured by using clock A.
2. Again, clock B has all three hands, and hence, 5 minutes also can be measured by using clock B.
3. Hence, option (C) is correct.

Consider measuring 4 minutes 10 seconds

1. Since clock B has all three hands, 4 minutes 10 seconds can easily be measured using clock B.
2. Clock A has a minute hand, so 4 minutes can be measured by clock A.
3. But, clock A does not have a second hand, so 10 seconds cannot be measured by it.
4. Hence, option (D) is incorrect.

Hence, option (c) is the correct answer.