Shalu‌ ‌bought‌ ‌7‌ ‌chairs‌ ‌of‌ ‌weight‌ 7 kg 700 gm. What will be the weight of 3 such chairs?

Options

A. 3 kg 300 gm
B. 3 kg 700 gm
C. 31000 gm
D. 3,010 gm

Answer

To solve the problem step by step, we will use the unitary method to find the weight of 3 chairs based on the weight of 7 chairs.

### Step 1: Understand the total weight of the chairs
Shalu bought 7 chairs, and the total weight of these chairs is given as 7 kg 700 gm.

### Step 2: Convert the total weight into grams
To make calculations easier, we can convert the total weight into grams.
1 kg = 1000 gm, so:
- 7 kg = 7 × 1000 gm = 7000 gm
- Therefore, 7 kg 700 gm = 7000 gm + 700 gm = 7700 gm.

### Step 3: Find the weight of one chair
Now, we need to find the weight of one chair by dividing the total weight by the number of chairs:
Weight of 1 chair = Total weight of 7 chairs / Number of chairs
Weight of 1 chair = 7700 gm / 7

Calculating this gives:
Weight of 1 chair = 1100 gm.

### Step 4: Find the weight of 3 chairs
Now that we know the weight of one chair, we can find the weight of 3 chairs:
Weight of 3 chairs = Weight of 1 chair × 3
Weight of 3 chairs = 1100 gm × 3 = 3300 gm.

### Step 5: Convert the weight back to kg and gm
To express 3300 gm in kg and gm:
- 3300 gm = 3 kg and 300 gm (since 1 kg = 1000 gm).

### Final Answer
The weight of 3 chairs is **3 kg 300 gm**.