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Question
| Dinu's Rate-List | |
| Kind of Junk | Price of 1 Kg |
| 1. Newspaper... | Rs. 6/- |
| 2. Iron... | Rs. 14/- |
| 3. Brass... | Rs. 180/- |
| 4. Plastic... | Rs. 12/- |
| 5. Water paper... | Rs. 4.50/- |
- Kiran bought 1 kg plastic for Rs 10, but sold 1 kg plastic for Rs 12. How much money does she earn on selling 1 kg plastic?
- So, how much money does she earn for 63 kg?
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Solution
(1) Kiran bought 1 kg plastic for Rs 10 and sold 1 kg plastic for Rs 12.
So, she earn Rs 12 - Rs 10 = Rs 2.
(2) For 1 kg plastic she earns Rs 2.
Therefore, for 63 kg plastic she earns = Rs 2 × 63 = Rs 126
It can be calculated as follows:
| 60 | 3 | |
| 2 | 60 × 2 | 3 × 2 |
| 120 | 6 |
You will get 126 by adding the digits in the last row.
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| Rate-List | |
| Kind of Junk | Price of 1 kg |
| 1. Waste Paper... | Rs. 4/- |
| 2. Newspaper... | Rs. 5/- |
| 3. Iron... | Rs. 12/- |
| 4. Brass... | Rs. 170/- |
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| Dinu's Rate-List | |
| Kind of Junk | Price of 1 Kg |
| 1. Newspaper... | Rs. 6/- |
| 2. Iron... | Rs. 14/- |
| 3. Brass... | Rs. 180/- |
| 4. Plastic... | Rs. 12/- |
| 5. Water paper... | Rs. 4.50/- |
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First guess the answer and then calculate:
77 × 55 = ?
First guess the answer and then calculate:
2 × 175 = ?
