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I'm appreciate if anyone can help me to do this question .. Question 5.. Thank you.

I'm appreciate if anyone can help me to do this question .. Question 5.. Thank you-example-1
User Abhijeetps
by
9.2k points

2 Answers

5 votes

u = 30

continuing your method


(1)/(10) =
(1)/(u) +
(1)/(15)

subtract
(1)/(15) from both sides


(1)/(u) =
(1)/(10) -
(1)/(15) thus


(1)/(u) =
(3)/(30) -
(2)/(30)


(1)/(u) =
(1)/(30) ⇒ u = 30



User Nitin Kabra
by
8.5k points
4 votes
The value of u is 5. 1/10 = 1/5 + 1/15 = 2/20 which equals 1/10
User Jacob Relkin
by
8.5k points

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