4. Ramesh has enough money for 6 weeks if he spends Rs 1400 per week during summer vacation. How long will the money last if he spends Rs 1050 per week?
Solution( By Unitary Method) :
Here we have to find out nos. of weeks. Therefore we will keep the week at right side in the statement.
∵ By spending Rs 1400 per week the money lasts for 6 weeks.
| ∴ By spending Re 1 per week the money lasts for 6×1400 weeks. | Explanation: For Re 1 per week spending the money will lasts for more numbers of weeks. . Therefore multiplication has been done. |
∴ By spending Re 1050 per week the money will last for (6×1400)/1050 weeks. | Explanation:For Rs 1050 per week spending, the money will lasts for less numbers of weeks in comparison to previous spending of Re 1 per week. Therefore division has been done. |
= 8400/1050 = 8 weeks Ans. |  |
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