<u>Answer:</u> The mass of substance is 7.5 kg
<u>Explanation:</u>
To calculate the volume of cuboid, we use the equation:
where,
V = volume of cuboid
l = length of cuboid = 30 cm
b = breadth of cuboid = 50 mm = 5 cm (Conversion factor: 1 cm = 10 mm)
h = height of cuboid = 0.2 m = 20 cm (Conversion factor : 1 m = 100 cm)
Putting values in above equation, we get:
- To calculate mass of a substance, we use the equation:
We are given:
Density of substance =
Volume of substance =
Putting values in above equation, we get:
Converting grams into kilograms, we use the conversion factor:
1 kg = 1000 g
So, 7500 g = 7.5 kg
Hence, the mass of substance is 7.5 kg