The cost of some grocery items is given in the following table. Find the total cost of each item.
| Item | Weight | Cost of 1 kg | Total cost |
|---|---|---|---|
| Rice | 12 kg 500 g | ₹60 | |
| Flour | 7 kg 250 g | ₹40 | |
| Sugar | 5 kg | ₹45 | |
| Chana dal | 3 kg 600 g | ₹70 | |
| Besan | 4 kg | ₹60 | |
| Jaggery | 1 kg 400 g | ₹50 |
Rice: 12 kg 500 g at ₹60 per kg
Given: Weight of rice = 12 kg 500 g Cost per kg = ₹60
Conversion: 12 kg 500 g = 12.5 kg
Formula: Total Cost = Weight × Rate
Calculation: Total Cost = 12.5 × ₹60 Total Cost = ₹750
Alternative Method: Cost for 12 kg = 12 × ₹60 = ₹720 Cost for 500 g = 0.5 × ₹60 = ₹30 Total Cost = ₹720 + ₹30 = ₹750
Answer: ∴ The total cost of rice is ₹750.
Explanation
The chapter explains multiplication with weights. Weight of rice = 12 kg 500 g = 12.5 kg. Cost per kg = ₹60. Total cost = 12.5 × ₹60 = ₹750. Alternatively: 12 kg at ₹60/kg = ₹720, and 500 g = 0.5 kg at ₹60/kg = ₹30. Total = ₹720 + ₹30 = ₹750.
Solution Steps
Step 1: Convert weight to kg: 12 kg 500 g = 12.5 kg
Step 2: Calculate cost: 12.5 × ₹60 = ₹750