Time taken to fill the sump — task. Assessments, Math TN.

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$6$ pumps are required to fill a water sump in

$1$ hour

$30$ minutes. The time taken to fill the sump if one pump is switched off is ___________

$1 \ hr \ 38 \ min$
$1 \ hr \ 48 \ min$
$1 \ hr \ 30 \ min$
$1 \ hr \ 25 \ min$

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