Answer:
1176.679ft²
Step-by-step explanation:
<u>The question is on surface area of a cylindrical fuel tank</u>
Equation for surface area of a cylinder
S.A = 2
rh +2r²
where r is the radius of cylinder and h is height of cylinder
Diameter=7'⇒r=3.5' and h=50'
Surface Area= 2×3.142×3.5×50 + 2×3.142×3.5×3.5
S.A=1099.7+76.979=1176.679ft²
268.50 unless you have to round more which it would be 267
Answer: Children tickets cost 7.50
Adult tickets cost 12.50
Step-by-step explanation:
Let a represent adult tickets
Let c represent child tickets
On the first day she sells 6 adult tickets and 5 children tickets for total of 112.50. This can be written as:
6a + 5c = 112.50 ...... equation i
On the second day she sells 8 adult tickets and 4 children tickets for the total 130. This can be written as:
8a + 4c = 130 ....... equation ii
6a + 5c = 112.50 ...... equation i
8a + 4c = 130 ....... equation ii
Multiply equation i by 4
Multiply equation ii by 5
24a + 20c = 450 ........ equation iii
40a + 20c = 650 ......... equation iv
Subtract iii from iv
16a = 200
a = 200/16
a = 12.50
Adult tickets cost 12.50
From equation ii,
8a + 4c = 130
8(12.50) + 4c = 130
100 + 4c = 130
4c = 130 - 100
4c = 30
c = 30/4
c = 7.50
Children tickets cost 7.50
You would multiply by the reciprocal (flip the fraction)
5/3 * 24 = 40
b = 40
