Question

a school provide milk to the student daily in cylinder glasses of diameter 7cm if the glass is filled with milk up to a height of 12 cm find how many litres of milk needed to serve 1600 students

Answer 1

Answer -

Given Diameter of cylinderical glass = 7cm

Radius (r) of glass will be, Diameter ÷ 2 = 7 ÷ 2 = 3.5cm

Given height (h) = 12 cm

Now, Volume of cylinderical glass =

$= > \: \pi r {}^{2} h \\ \\ \pi = \frac{22}{7} \\ \\ \frac{22}{7} \times 3.5 {}^{2} \times 12 \\ \\ \frac{22}{7} \times 12.25 \times 12 \\ \\ \frac{22}{7} \times \frac{49}{4} \times 12 \\ \\ 22 \times 7 \times 3 \\ \\ 462 \: cm {}^{3}$

Now volume is 462 cubic cms

Milk needed to serve 1600 Students = 462 × 1600 = 739200 cubic cms

=> 739200 cubic cms = 739.2 litres.

HOPE IT WOULD HELP YOU

Answer 2

Step-by-step explanation:

volume of cylinder=πr²h

=3.14*3.5²*12

=461.58 cm³

cm³ into litres =461.58/1000=0.46158 lit

Now we have to distribute it for 1600 students

Therefore , volume of 1 bottle or cylinder =0.46158 lit

volume of 1600 bottles or cylinders =0.46158 * 1600

= 738.528   lit

Therefore, 738.5288 litres are required to distribute milk for 1600 students.