try to get there your rope.
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 5m above the previous level. the wall of the well is 1m 20cm high and a pulley is fixed at a height of 80cm . Raghu wants to draw water from the well. the minimum length of the rope that he can use is (in m).
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