Medical research and psychological testing have proven conclusively that male children between the ages of 15-18 sleep, on average, 3 hours longer per day than female children between the ages of 15-18. What is the BEST way to revise this sentence without changing its meaning? A) Males sleep longer than females. B) Research has proven that teenage males sleep 3 hours longer per day than teenage females. C) Medical and psychological testing has conclusively proven that males sleep 3 hours longer per day than females. D) Testing has shown that teenage boys between the ages of 15-18 sleep longer than teenage girls in the same age group.

D) Testing has shown that teenage boys between the ages of 15-18 sleep longer than teenage girls in the same age group.

Explanation:

The best way to revise this sentence is given in option D.

Option A lacks all necessary details, simply stating that males sleep longer than females. The research/testing, children's age, and the hours are not mentioned.

Option B feels like the second best, but a very important piece of information is missing - the specific age. Teenagers are children aged 13-19, and the difference between 13- and 19-year-olds is huge.

Option C also lacks information about the subjects' age.

Option D is also not ideal but feels the most complete. It doesn't mention how much longer exactly the boys sleep, but that detail isn't as important as the specific age is.

we know that, volume of a rectangular prism is given by :

✿   {length × width × height}

given : the length of rectangular prism = 5.5

given : the width of rectangular prism = 6

given : the height of rectangular prism = 3

⇒ the volume of given rectangular prism = {5.5 × 6 × 3}

⇒ the volume of given rectangular prism = 99