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- Knowing your numbers Exercise 1.1
- Knowing your numbers Exercise 1.2
- Knowing your numbers Exercise 1.8
- Knowing your numbers Exercise 1.3
- Knowing your numbers Exercise 1.4
- Knowing your numbers Exercise 1.5
- Knowing your numbers Exercise 1.6
- Knowing your numbers Exercise 1.7
- Knowing your numbers Exercise 1.9
- Knowing your numbers Exercise 1.10

- Knowing your numbers
- Playing with numbers
- Whole Numbers
- Operations on whole numbers
- Negative number and integers
- Fractions
- Decimals
- Introduction to Algebra
- Ratio, Proportion and Unitary Method
- Basic Geometrical Concepts
- Angles
- Triangles
- Circles
- Pair of Lines and Transversal
- Understanding Three Dimensional Shapes
- Symmetry
- Basic Geometrical Tools
- Geometrical Constructions
- Mensuration
- Data Handling Presentation Of Data
- Data Handling – II
- Data Handling Bar Graphs

A box of medicine tablets contains 2, 00, 000 tablets each weighing 20mg. What is the total weight ofall the tablets in the box in grams? In kilograms?

Answer:

It is given that Weight of each tablet = 20mg

So we get

Weight of 2, 00, 000 tablets = 2, 00, 000 × 20

We get the weight of 2, 00, 000 tablets = 40, 00, 000mg

We know that Total weight of tablets in the box = 40, 00, 000mg

It can be written as 1g = 1000mg

So the weight of box having tablets = 40, 00, 000/ 1000 = 4000g

We know that 1kg = 1000g

So the weight of box having tablets = 4000/ 1000 = 4kg

Therefore, the total weight of all the tablets in the box is 4000g or 4kg.

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