Answer:
153.94
Step-by-step explanation:
The formula for area is pi*radius^2
the radius is 7, so we do pi7^2 which is 49pi
49pi is 153.93804 which is 153.94 rounded to two decimal places
Remember
area=pir^2
circumference=2pir
the surface aera if you thinkg about it is
2 times the tops+area around
the tops are circles so 2*pir^2 is tops
the area around is a rectangle that has been wrapped around the cylinder,
the hieght is the legnth and the circumference is width
so 2hpir is the area around
2pir^2 is the areas of the tops
2hpir is the area around
<span>25 1/2 + 18 1/5
=</span><span>25 5/10 + 18 2/10
=43 7/10</span>
Answer:
It will take 30 minutes
Step-by-step explanation:
Here, we want to calculate the time it will take for the three friends to be at the starting point again
What we do here is to note the time it will take for each of the three friends to run a lap
That will be 6 , 3 and 5
What we now need to know the time is to find the lowest common multiple of the three amount of time
The lowest common multiple of 6,3 and 5 is 30
So the amount of time it will take the friends to be at the starting point again is 30 minutes
