Question

A cylilindrcal water tank of dia 4m and height 3.5m is filled completely with water. A tap attached to the tank empties the tank @ 2 litres per minute. In how many minutes will the tank be empty

Answer 1

firstly find it's volume

=
$\frac{22}{7} \times {2}^{2} \times 3.5$
hence answer will be 44
${m}^{2}$
tap takes out 2 litres in 1 minute
it will take 1/2 minute to take out 1 litre
so to take out 44 litre it will take 22minutes