Lucy is speed-reading a book. She has 40 more pages to read. She wants to know how many minutes m it will take her to finish the book if she reads pages per minute. How many pages per minute does Lucy need to read if it’s 11:30 pm and she wants to finish the book by midnight?

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.