$($a$)$

Estimate the time it would take $($in hours$)$ to fill a private swimming pool with a capacity of $60,000$ L using a garden hose delivering $47$ L$/$min$.$

hours

$($b$)$

How long would it take $($in s$)$ to fill if you could divert a moderate size river, flowing at $2200$ m$3/$s$,$ into it$?$

s