An empty glass jar weighing 1.54 kg is in the shape of a cylinder which has a radius of 14cm and a height of 20cm. Calculate how many litres of water it will hold when filled to the top.Also calculate its weight when it is filled with water (take pie=22/7)

volume of jar =π(14^2(20) = 280π L

Since 1 L weighs 1 kg
the total weight is 280π + 1.54 = appr. 881.54

(The weight of 1 L of water is 1 Kg within 1/10000 of a kg, but since you are asked to use the rather clumsy value of 22/7 for π, we can go with that.
With the easy access to calculators, where the majority of them have π build in to about 7 digit accuracy, it surprises me that your text asks for 22/7 for π)

the 280π is in cm^3 not litres.

so we have
288π/1000 + 4.54 = 2.45 kg

To calculate the volume of the jar, we'll use the formula for the volume of a cylinder:

Volume = π * radius^2 * height

First, let's convert the radius from centimeters to meters, as the formula requires the measurements to be in a consistent unit. 14 cm = 0.14 m.

Now we can substitute the values into the formula:

Volume = π * (0.14 m)^2 * 20 cm

To get the volume in liters, we need to convert the volume from cubic meters to liters. Since 1 liter is equal to 0.001 cubic meters, we can multiply the calculated volume by 1000.

Volume (in liters) = π * (0.14 m)^2 * 20 cm * 1000

To calculate the weight of the empty jar, we can simply use the given weight, which is 1.54 kg.

Now, to calculate the weight of the filled jar, we need to calculate the weight of the water it will hold. The weight of an object is equal to its mass multiplied by the acceleration due to gravity.

The mass of the water can be found using the formula:

Mass = Volume * Density

The density of water is approximately 1000 kg/m^3.

Finally, the weight of the jar filled with water will be:

Weight = Weight of the empty jar + Weight of the water

Remember to use the given value of π as 22/7 for these calculations.

Let's calculate the answers:

Volume = (22/7) * (0.14 m)^2 * 20 cm * 1000
Weight of the filled jar = 1.54 kg + (Volume * 1000 kg/m^3 * 9.8 m/s^2)