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Over [174]
3 years ago
15

Train A and train B leave the central station at the same time.They travel the same sped,but in opposite directions,with train A

heading towards station A, and train B heading Towards station B.Train A reaches station A after
2 1/2 h.Train B reaches station B after 4h.Station A and B are 585 mi apart

What is the rate of the trains?

—— mph
Mathematics
1 answer:
Shtirlitz [24]3 years ago
5 0

Train B reaches station B after 312 h

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Pumps A, B, and C operate at their respective constant rates. Pumps A and B, operating simultaneously, can fill a certain tank i
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Answer:D) 1 hr

Step-by-step explanation:

Given

Pump A and B can fill tank in \frac{6}{5} hr

Pump A and C can fill tank in \frac{3}{2} hr

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Let A be the total hr taken A therefore rate of A=\frac{1}{A} /hr

Let B be the total hr taken B therefore rate of B=\frac{1}{B} /hr

Let C be the total hr taken C therefore rate of C=\frac{1}{C} /hr

\frac{1}{A}+\frac{1}{B}=\frac{5}{6}-----1

\frac{1}{B}+\frac{1}{C}=\frac{1}{2}-----2

\frac{1}{A}+\frac{1}{C}=\frac{2}{3}-----3

Adding 1,2 & 3

2(\frac{1}{A}+\frac{1}{B}+\frac{1}{C})=\frac{5}{6}+\frac{1}{2}+\frac{2}{3}

\frac{1}{A}+\frac{1}{B}+\frac{1}{C}=\frac{2}{2}

\frac{1}{A}+\frac{1}{B}+\frac{1}{C}=1

thus time taken by A,B and C combined is 1 hr

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Step-by-step explanation:

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4 years ago
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vlabodo [156]

Answer: The perimeter is 48 inches. The area is 140

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Since we have the length and width, we know the formula of perimeter is L+L+W+W. So 10+10+14+14= 48 The formula of area is LxW so 14 x 10= 140

4 0
3 years ago
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