Deepa goes to a post-office to post/mail letters and parcels. The postal rates depicted are as below:
Letter Weighing :
(i) 20 g or less - ₹ 5.00
(ii) Per every additional 20 g - ₹ 2.00
Parcel Weighing :
(i) 50 g or less - ₹ 5.00
(ii) For every additional 50 g - ₹ 3.00
Deepa wants to send two parcels weighing 250 g and 300 g respectively and two letters each to 20 g and 35 g respectively. How much postal charge does she have to pay?

Options

A. 49
B. 41
C. 48
D. 39

Explanation

To solve the problem, we need to calculate the postal charges for Deepa's parcels and letters based on the given rates. Let's break it down step by step.

### Step 1: Calculate the postal charge for the first parcel (250 g)
- The first parcel weighs 250 g.
- The rate for parcels is ₹5.00 for the first 50 g.
- For every additional 50 g, the charge is ₹3.00.

**Calculation:**
1. The first 50 g costs ₹5.00.
2. The remaining weight is 250 g - 50 g = 200 g.
3. The number of additional 50 g slots in 200 g is 200 g / 50 g = 4 slots.
4. The cost for these additional slots is 4 slots × ₹3.00 = ₹12.00.

**Total cost for the first parcel:**
- ₹5.00 + ₹12.00 = ₹17.00.

### Step 2: Calculate the postal charge for the second parcel (300 g)
- The second parcel weighs 300 g.

**Calculation:**
1. The first 50 g costs ₹5.00.
2. The remaining weight is 300 g - 50 g = 250 g.
3. The number of additional 50 g slots in 250 g is 250 g / 50 g = 5 slots.
4. The cost for these additional slots is 5 slots × ₹3.00 = ₹15.00.

**Total cost for the second parcel:**
- ₹5.00 + ₹15.00 = ₹20.00.

### Step 3: Calculate the postal charge for the first letter (20 g)
- The first letter weighs 20 g.

**Calculation:**
- The cost for letters weighing 20 g or less is ₹5.00.

**Total cost for the first letter:**
- ₹5.00.

### Step 4: Calculate the postal charge for the second letter (35 g)
- The second letter weighs 35 g.

**Calculation:**
1. The first 20 g costs ₹5.00.
2. The remaining weight is 35 g - 20 g = 15 g.
3. Since 15 g is less than 20 g, we need to calculate the additional charge.
4. The additional 15 g falls under the next 20 g slot, which costs ₹2.00.

**Total cost for the second letter:**
- ₹5.00 + ₹2.00 = ₹7.00.

### Step 5: Calculate the total postal charge
Now, we can sum up the total charges for both parcels and both letters.

**Total postal charge:**
- Total for parcels = ₹17.00 + ₹20.00 = ₹37.00.
- Total for letters = ₹5.00 + ₹7.00 = ₹12.00.
- Grand Total = ₹37.00 + ₹12.00 = ₹49.00.

### Final Answer:
Deepa has to pay a total of ₹49.00 for sending her letters and parcels.

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