MBA Exam

Of three taps X, Y and Z, Y takes 2 times as much time as X and Z together, while X takes 20 minutes more than Y and Z together, to fill a tank. If the three taps together fill the tank in 24 minutes, then how long does X take to fill the tank individually?

Plz follow up with method...

1) 30 min
2) 60 min
3) 90 min
4) 120 min

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MBA Other Question
If xΔ(y +1) = yΔ(x +1),xΔ x = 1 and (x − y)Δ(x + y) = xΔ y, then what is the value of 1001Δ1?Discuss please...

1) 1000
2) 100
3) 10
4) 1
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1) 1/4
2) 2/5
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4) 3/4
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