Question 1 would be 4 divided by 1/3 (A)
Question 2 would be 16 (A)
Question 3 would be 48 (B)
Question 4 would be 60 laps
Question 5 would be 1/15th
Hope this helps!! :D
Answer:
90π cm²
Step-by-step explanation:
Given: Radius of circular base= 5 cm
height= 12 cm
Now finding the surface of cone.
Formula; Surface area of cone= 
Where; r= radius
l= slant height
B is the area of base, which is circle.
Area of circle (B)= πr²
Area of circle (B)= 
∴ Area of circle (B)= 
Finding slant height (l)
Formula; 
⇒l = 
∴ l= 
Next, using the formula for finding surface area of cone.
Surface area of cone= 
⇒ Surface area of cone= 
∴ Surface area of cone= 90π cm²
Answer:
420
Step-by-step explanation:
The number of students in the school is unknown, so we'll call it x.
55% of the number of students are girls.
There are 321 girls.
55% of x = 231
0.55x = 231
x = 231/0.55
x = 420
Answer: 420
It would be 16 meters long
It says to find the sum of the angle measures in a 16-gon.
We have a formula to find the sum of interior angles of polygon with 'n' sides.
Sum = (n-2)·180°
Here the value of n would be 16 for a 16-gon.
So, sum = (16-2) × 180° = 14 × 180° = 2520°
Hence, the sum of the angle measures in a 16-gon is 2520°
