1.

1). 10002). 5003). 6004). 1200

Answer»

A pipe can fill the tank in = 120 hours

∴ In 1 hour pipe can fill = 1/120

Tank is actually FILLED in = 150 hours

∴ In 1 hour tank actually fills = 1/150

∴ In 1 hour the leak empties,

$( \RIGHTARROW \frac{1}{{120}} - \frac{1}{{150}})$ 

$( \Rightarrow \frac{{5 - 4}}{{600}})$ 

⇒ 1/600

∴ The leak can EMPTY the WHOLE tank in = 600 hours



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