Who was responsible for building the Great wall of China?

From the top of a building, the angles of elevation and depression of top and bottom of a tower are 60 deg and 30 deg respectively. If the height of the building is 5m, then the height of the tower is

The angle of depression of the foot of a building from the top of a tower 30 m away is 30 deg. How high is the tower?

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.   

Proteins are providers of energy in an emergency, (1)/ and are primarily used as building blocking (2)/ for growth and repair of many body tissues. (3)/ No error (4)

On 9 November 2017, House Building Advance (HBA) rules were revised. Now, under the new rules, the central government employee can barrow a maximum of how much amount from government?

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Many persons of good education unconsciously circumscribe themselves ___________ a small vocabulary. They have a knowledge of hundreds of desirable wordswhich they do not put _________ practical use in their speech or writing. Many, too, are conscious __________ a poverty of language, which engenders in them a senseof timidity and self-___________. The method used for building a large vocabulary has __________ been confined to the study of single words.

large vocabulary has __________ been confined

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Many persons of good education unconsciously circumscribe themselves ___________ a small vocabulary. They have a knowledge of hundreds of desirable wordswhich they do not put _________ practical use in their speech or writing. Many, too, are conscious __________ a poverty of language, which engenders in them a senseof timidity and self-___________. The method used for building a large vocabulary has __________ been confined to the study of single words.

timidity and self-___________. The method used

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Many persons of good education unconsciously circumscribe themselves ___________ a small vocabulary. They have a knowledge of hundreds of desirable wordswhich they do not put _________ practical use in their speech or writing. Many, too, are conscious __________ a poverty of language, which engenders in them a senseof timidity and self-___________. The method used for building a large vocabulary has __________ been confined to the study of single words.