CSIR NET 2018 Earth Science Question Paper (17-Jun-2018)

Question 1

A and B move clockwise around a circle, starting from a common point O. A takes 9 minutes to complete a round but re-starts after a delay of 1 minute. B takes 13 minutes to complete the round but restarts after a delay of 2 minutes. How many minutes after they began would they meet again at O?

Accepted Answer

29

Answer

30

Answer

31

Answer

28

Question 2

Fourteen of the students in a class are girls. Eight students in the class wear blue shirts. Two are neither girls nor wear blue shirts. Five students who wear blue shirts are girls. How many students are there in the class?

Accepted Answer

19

Answer

29

Answer

17

Answer

24

Question 3

A stick of length L is broken into two pieces at random. What is the average length of the smaller piece?

Accepted Answer

$L/4$

Answer

$L/6$

Answer

$L/3$

Answer

$L/2$

Question 4

A long-distance runner finds a water station after completing $\frac{1}{7}$th of the total distance. After covering another $\frac{1}{6}$th of the total distance he gets medical-aid. Another runner joins him 4 km after the medical-aid station. The second runner stops 4 km before the completion of run, covering $\frac{1}{2}$ of the total distance. What is the total distance?

Accepted Answer

42 km

Answer

21 km

Answer

30 km

Answer

50 km

Question 5

Movement of a car with respect to time is given below: The average speed of the car is

Accepted Answer

21.43

Answer

30.42

Answer

20.43

Answer

10.43

CSIR NET 2018 Earth Science Question Paper (17-Jun-2018)

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