Deepa goes to a post office to post-mail letters and parcels. The postal rates depicted are as below: Letter Weighting: i) 20 g or less – Rs. 5.00 ii) Per every additional 20 g – Rs. 2.00 Parcel Weighting: i) 50 g or less – Rs. 5.00 ii) For every additional 50 g – Rs. 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?

Deepa goes to a post office to post-mail letters and parcels. The postal rates depicted are as below: Letter Weighting: i) 20 g or less – Rs. 5.00 ii) Per every additional 20 g – Rs. 2.00 Parcel Weighting: i) 50 g or less – Rs. 5.00 ii) For every additional 50 g – Rs. 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? Correct Answer Rs. 49

Given:

Letter Weighting:

i) 20 g or less – Rs. 5.00

ii) Per every additional 20 g – Rs. 2.00

Parcel Weighting:

i) 50 g or less – Rs. 5.00

ii) For every additional 50 g – Rs. 3.00

Calculation:

Price of letter weight 20 g = 5

Price of letter weight 35 g = 20 g + additional 15 g = 5 + 2 = 7

Price of parcel weight 250 g = 50 g + additional 200 g

⇒ 50 g + additional (4 × 50)g

⇒ 5 + 4 × 3 = 17

Price of parcel weighting 300 g = 50 g + additional 250 g

⇒ 50 g + additional (5 × 50)g

⇒ 5 + 5 × 3 = 20

Total postal charge = 5 + 7 + 17 + 20 = 49

∴ Deepa will pay Rs 49