Explanation

 Ice blocks are covered with sawdust primarily to provide necessary insulation from heat, preventing them from melting quickly. 

Explanation

Step 1: Work Done by One Man and One Child in One Day

16 men complete the work in 12 days.
Work done by 16 men in 1 day = 1/12

Work done by 1 man in 1 day = 1/12×16=1/192

24 children complete the work in 18 days.

Work done by 24 children in 1 day = 1/18

Work done by 1 child in 1 day = 1/18×24=1432

Step 2: Work Done by 12 Men and 8 Children in One Day

Work done by 12 men in 1 day = 12×1/192=12/192=1/16

Work done by 8 children in 1 day = 8×1/432=8/432=1/54

Total work done per day by 12 men and 8 children = 1/16+1/54

​ Taking LCM (16, 54) = 432, 

27/432+8/432=35/432

 So, work done per day = 35/432

Step 3: Work Done in 8 Days

Work done in 8 days = 8×35/432=280/432

Remaining work = 1−280/432=152/432

Step 4: Work Done After Adding 3 More Children

Work done by 3 children in 1 day = 3×1/432=3/432

New work rate per day = 35/432+3/432=38/432

Remaining days required = 152/432/38/432=4 days

Explanation

Explanation

"Higher Than Hope" is the authorized biography of Nelson Mandela, written by Fatima Meer.

Explanation

Justice Asif Saeed Khosa became the 26th Chief Justice of Pakistan.

He took oath on 18th January 2019 and served till 20th December 2019.

Explanation

 Ligaments are tough, fibrous bands of connective tissue that connect bone to bone, primarily around joints, helping to stabilize them and limit excessive movement. 

Explanation

"They should help him" is in the active voice,

Where the subject ("They") acts on the object ("him")

Shifting the focus from the doer (they) to the receiver of the action (he).

Therefore, the correct passive voice form is:

"He should be helped."

Explanation

 "Your teachers have"is the correct construction.

"Have" agrees with the plural subject "teachers" and indicates the past tense.

"(B) haven't your teachers" is incorrect because it's in the present perfect tense. The sentence is asking about something that happened in the past, not the present.

"(C) your teacher have" is incorrect. "Your teacher" is singular, so "has" should be used.

Explanation

 The pulse rate is a measurement of the heart rate, or the number of times the heart beats per minute. 

Explanation

 Anaerobic Organisms: Anaerobic organisms, including certain bacteria, are those that do not require oxygen for growth and survival. 

Oxygen Toxicity: Some anaerobic bacteria are highly sensitive to oxygen and cannot tolerate its presence, while others can tolerate small amounts of oxygen.