John runs at 12 km/h. How far does John run in 2.5 hours?
John runs at 12
km/h. How far does John run in 2.5
hours?
distance = speed * time
distance = 12 km/h * 2.5 h
distance = 30 km
Therefore, John runs 30 km in 2.5 hours.
If Jason earns $24
/h, and has worked 4.5
hours with a 30
minute unpaid break, how much has he earnt?
To calculate the amount Jason has earned, we first need to determine the total hours worked.
Total hours worked = hours worked - unpaid break
Total hours worked = 4.5 hours - 0.5 hours
Total hours worked = 4 hours
Now that we know Jason worked for 4 hours, we can calculate his earnings:
Earnings = rate * time
Earnings = $24/hour * 4 hours
Earnings = $96
Therefore, Jason has earned $96.
If Ally earns $20
/h, how much will Ally have earnt in 3.5
hours?
To calculate Ally's earnings, we need to multiply her hourly rate by the number of hours she worked.
Earnings = Rate * Time
Earnings = $20/hour * 3.5 hours
Earnings = $70
Therefore, Ally will have earned $70 for working 3.5 hours.
Melina's typing speed is 36 wpm (words per minute). She finished a job in 5 hours. How long would the same job have taken her if she typed 48 wpm?
Let's begin by calculating the number of words in the job.
Number of words = typing speed * time
For Melina at 36 wpm, the number of words in the job would be:
Number of words = 36 wpm * 5 hours * 60 minutes
Number of words = 10800 words
Now that we know the number of words, we can calculate how long it would take her at 48 wpm.
Time = number of words / typing speed
Time = 10800 words / 48 wpm / 60 minutes
Time = 3.125 hours or 3 hours and 8 minutes (rounded to the nearest minute)
Therefore, if Melina typed at 48 wpm, the same job would have taken her approximately 3 hours and 8 minutes to complete.
a triangle has height and base dimensions in in a ratio of 3:7 If a particular triangle has a height of 9cm, what is the length of its base?
Let's start by using the ratio between the height and base of the triangle:
height : base = 3 : 7
We know that the height of the triangle is 9 cm, so we can set up an equation to solve for the base:
3/7 = 9/x
where x is the length of the base.
To solve for x, we can cross-multiply:
3x = 7 * 9
3x = 63
x = 21
Therefore, the length of the base of the triangle is 21 cm.