In a tropical year, the numbers of sidereal days are

A can do a piece of work in 24 days, B in 32 days and C in 64 days. All begin to do it together, but A leaves after 6 days and B leaves 6 days before the completion of the work. How many days did the work last?

A

20

Sidereal day

A

Is the period of time taken by the earth in making a complete rotation with reference to stars

B

Is slightly shorter than an ordinary solar day

C

Is divided into the conventional hours, minutes and seconds

D

All the above

The sidereal day is the time interval between two successive upper transits of

A

Mean sun

B

First point of Aries

C

First point of Libra

D

The polar star

What is 'Sidereal Day'?

A

The day on which the duration of sunshine is the maximum

B

The day on which the duration of sunshine and darkness are equal

C

The time during which the earth makes a complete rotation on its axis in respect of the fixed stars

D

The day on which the sun reaches its maximum distance from the equator

The.............. of the world extend around the equator in tropical and semi-tropical regions.

A

. areas that grow cotton

B

growth of cotton areas

C

cotton-growing areas

D

areas that cotton is grown

If the wind in a tropical depression exceeds this speed, it is ----- to a this speed, it is ----- to a 'tropical storm' and ---- a personal name.

A

sundry, help

B

productive, support

C

efficient, subsidy

D

successful, coverage

If the wind in a tropical depression exceeds this speed, it is ---- to a 'tropical storm' and ---- a persona name.

A

demoted, awarded

B

consigned, gifted

C

upgraded, assigned

D

elevated, presented

If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because

A

The soil of rain forest is deficient in nutrients

B

Propagules of the trees in a rain forest have poor viability

C

The rain forest species are slow growing

D

Exotic species invade the fertile soil of rain forest

A can do a piece of work in 10 days , B can do the same in 30 days and c in 60 days . If A is assisted on alternate days by B and C, in how many days would the work get completed?

A

4

B

5

C

6

D

8

A can do a job in 24 days . B in 9 days and C in 12 days . B and C together start the work but leave after 3 days . How many days was taken by A to complete the remaining work ?

A

7

B

9

C

10

D

12

In a tropical year, the numbers of sidereal days are

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