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Questions: 3 / 20
Q3. Supposing that telegraph poles on a railway track are 50 metres apart. How many pole will be passed by a train in 2 hours. If the speed of the train is 45 km/hr
1801
1800
1601
1600
Solution:
Distance travelled by train in 2 hours = 45 × 2 = 90 kms = 90000 m
No. of pole passed = 90000/50+1
= 1800 + 1
= 1801 poles
No. of pole passed = 90000/50+1
= 1800 + 1
= 1801 poles
Questions: 4 / 20
Q4. A train 150 metre long, passes a pole in 15 seconds and another train of the same length travelling in the opposite direction in 12 seconds. The speed of the second train is
45 km/hr
48 km/hr
52 km/hr
54 km/hr
Solution:
When distance is same, speed is indirectly proportional to the time
Speed of the first train = 150/15 = 10 m/s
Speed of the second train = 10/12×15
= 150/12 m/s
=150/12×18/5
= 45 km/hr
Speed of the first train = 150/15 = 10 m/s
Speed of the second train = 10/12×15
= 150/12 m/s
=150/12×18/5
= 45 km/hr
Questions: 5 / 20
Q5. A, B and C are partners in a business. A, whose money has been used for 4 months, claims 1/8 of the profit, B whose money has been used for 6 months, claims 1/3 of the profit. C had invested Rs. 1560 for 8 months. How much did A and B contribute?
Rs. 740, Rs. 1250
Rs. 730, Rs. 1240
Rs. 720, Rs. 1280
Rs. 750, Rs. 1260
Solution:
C’s share =1-(1/8+1/3)=13/24
C’s investment = 1560 × 8
If 13/24=1560×8
Then, 1/8=(1 ×1560 ×8 ×24)/(8 ×13)
= 120 × 24
A’s share is for 4 months
∴ 120 × 24 = 120 × 6 × 4
A’s share = 120 × 6 = 720
B’s share =1/3=(1 ×1560 × 8 × 24)/(3 ×13)
= 120 × 8 × 8
B’s share is for 6 months
120 × 8 × 8 = 20 × 6 × 8 × 8
B’s share = 20 × 8 × 8 = 1280
C’s investment = 1560 × 8
If 13/24=1560×8
Then, 1/8=(1 ×1560 ×8 ×24)/(8 ×13)
= 120 × 24
A’s share is for 4 months
∴ 120 × 24 = 120 × 6 × 4
A’s share = 120 × 6 = 720
B’s share =1/3=(1 ×1560 × 8 × 24)/(3 ×13)
= 120 × 8 × 8
B’s share is for 6 months
120 × 8 × 8 = 20 × 6 × 8 × 8
B’s share = 20 × 8 × 8 = 1280
Questions: 8 / 20
Q8. Consider the given statement/s to be true and decide which of the given conclusions/assumptions can definitely be drawn from the given statement.
Statement:
I All astronomers are scientists.
II Some scientists are shopkeepers.
Conclusion:
I. All astronomers are shopkeepers.
II.Some shopkeepers are astronomers.
III.Some shopkeepers are scientists.
IV.All scientists are astronomers.
Statement:
I All astronomers are scientists.
II Some scientists are shopkeepers.
Conclusion:
I. All astronomers are shopkeepers.
II.Some shopkeepers are astronomers.
III.Some shopkeepers are scientists.
IV.All scientists are astronomers.
Only ⅠConclusion follows
Conclusions Ⅰ,ⅡandⅢfollows
Only conclusion Ⅲfollows
Conclusion Ⅱand IV follows
Questions: 11 / 20
Q11. The law of scarcity:
does not apply to rich, developed countries.
applies only to the less developed countries.
implies that consumers’ wants will be satisfied in a socialistic system.
implies that consumers wants will never be completely satisfied.
Questions: 12 / 20
Q12. The Indus Valley Civilization was:
Father base
Mother base
Same rights of mother and father
None of these
Questions: 13 / 20
Q13. Which of the following was one of the causes of Harappan decline?
Ecological change
Earthquakes
Aryan attack
All of these
Questions: 14 / 20
Q14. Who is called the Guardian of public purse?
President
Comptroller and Auditor-General
Parliament
Council of Ministers
Questions: 15 / 20
Q15. Which one of the following is the largest committee of the Parliament?
The Public Accounts Committee
The Estimates Committee
The Committee on Public Undertakings
The Committee on Petition
Questions: 16 / 20
Q16. Sound cannot travel though
solids
liquids
gases
vacuum
Questions: 17 / 20
Q17. Noise and music differ in their
quality
tone
note
pitch
Questions: 18 / 20
Q18. The enzymes are killed
at a very high temperature
during chemical reaction
at low temperature
under atmospheric pressure
Questions: 19 / 20
Q19. The water and mineral salts are transported to the various organs by which of the following?
Xylem
Phloem
Cortex
Cambium
Questions: 20 / 20
Q20. The food material prepared in the plants is transported to the various organs by which of the following?
Xylem
Phloem
Cortex
Cambium