Answer:
1st question answer is A = πr^2 2nd question answer is A≈28.27ft²
Step-by-step explanation:
For this case, what we can do is calculate an average of the time it takes to fill the tank for both pipes.
We have then:
taver = (tA + tB) / (2)
Where,
taver: average time (both pipes)
tA: time it takes the pipe A
tB: time taken by pipe B
Substituting the values:
9.9 = (18 + tB) / (2)
Clear tB:
tB = (2 * (9.9)) - 18
tB = 1.8 hours
Answer:
it takes pipe B, running alone, to fill the tank about 1.8 hours
Answer:
1. 28
2. 26
3. 29
4. 18
5. 32
6. 14
7. 3
8. left
Step-by-step explanation:
Answer:
3,6,9,12,15,18,21}
B={4,8,12,16,20}
C={2,4,6,8,10,12,14,16}
D={5,10,15,20}
(i) A−B={3,6,9,15,18,21}
(ii) A−C={3,9,15,18,21}
(iii) A−D={3,6,9,12,18,21}
(iv) B−A={4,8,16,20}
(v) C−A={2,4,8,10,14,16}
(vi) D−A={5,10,20}
(vii) B−C={20}
(viii) B−D={4,8,12,16}
(ix) C−B={2,6,10,14}
(x) D−B={5,10,15}
(xi) C−D={2,4,6,8,12,14,16}