Ramu and Shamu together earn Rs. 500 per day, while Shamu and Kalu together earn Rs. 450 per day. If Shamu, Ramu and Kalu, working together earn Rs. 700 per day, then calculate the ratio of one day’s work of Shamu and Kalu?

Ramu and Shamu together earn Rs. 500 per day, while Shamu and Kalu together earn Rs. 450 per day. If Shamu, Ramu and Kalu, working together earn Rs. 700 per day, then calculate the ratio of one day’s work of Shamu and Kalu?
1). 4 ∶ 5
2). 1 ∶ 1
3). 5 ∶ 4
4). 3 ∶ 5

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