Question

Water flows through a cylindrical pipe at a speed of 8 cm/s. The radius of the circular cross-section is 1.5 cm and the pipe is always completely full of water. Calculate the amount of water that flows through the pipe in 1 hour. Give your answer in litres.

Answer 1

area of crss section=pie ×r^2

=3.14× 1.5

=4.17

vol. of cyl. = 4.17×8

=37.68

in 1 sec. 37.68 ml water is came out from pipe

then in 1 hour= 60×60×37.68

=5135648 ml

in letre, 5135.648 l Ans.

please mark the answer as brainliest.

Answer 2

Answer:

203.5 litres (1 d.p)

Step-by-step explanation:

8cm/s --> 8cm per second

1 hr = 3600 s

8 x 3600 = 28800 cm = length

$V= \pi r^{2}$

$V= 3.14 * (1.5)^{2} *28800 = 203472 cm^{2}$

1 litre = $dm^{3}$

1 litre = 1000 $cm^{2}$

203472 / 1000 = 203.472 litres

ANSWER - 203.5 litres (1 d.p)