A cylindrical vessel of radius 3.5 m is full of water. If 15400 litres of water is taken out from it, then the drop in the water level in the vessel will be:
Volume of water = 15400Â litres =Â 15400000 ml
radius(r) = 3.5 m = 350 cm
ATQ,
$$\pi r^2 h =Â 15400000$$
$$\frac{22}{7} \times 350 \times 350 \times h =Â 15400000$$
h =Â 15400000/385000 = 40 cm
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