4. Water level in a well was 20m below ground level. During rainy season, rain water collected in different
water tanks was drained into the well and the water level rises Sm above the previous level. The wall of the
well is im 20cm high and a pulley is fixed at a height of 80cm. Raghu wants to draw water from the well.
Find the minimum length of the rope that he can use.
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DO YOURSELF AND MARK ME AS BRAINLIEST
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