Question

the height of a cylindrical tank is 1 m and its diameter is 70 cm. find the volume of the tank in litres

Answer 1

$\pi \times 0.35 {}^{2} \times 1 = 0.38465$
in m3
1 m3 = 1000 l
0.38465 = 384.65l


formula of volume of cylinder = pie * radius) square * height

Answer 2

SOLUTION :

the height of cylindrical tank = 1m (given)
The diameter of cylindrical tank = 70cm = 0.70m (given)

radius of tank = diameter ÷ 2
radius of tank = 0.70 ÷ 2 = 0.35 cm


Now,
Volume of the cylindrical tank
$= \pi {r}^{2} h$

$= \frac{22}{7} \times {(0.35)}^{2} \times 100 \\ \\ = \frac{22}{7} \times 0.35 \times 035 \times 1\\ \\ = 0.385 {m}^{3}$


Now
$1 {m}^{3} = 1000l$

$= 0.385 \times 1000 = 385litres$


Hence
volume of tank = 385 litres