Water level in a well was 30m below ground level. During the rainy season, rain water collected in different water tanks is drained into the well and the water level rises 7 m above the previous level. The wall of the well is 1m 20 cm high and a pulley is fixed at a height of 80 cm. Raghu wants to draw water from the well. What is the minimum length of the rope that he can use? need step by step explaination.
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Answer:
Given-
Height of the wall of the well = 1m 20 cm
Height of the fixed pulley
= 80 cm
= 0.8 m
Water level in a well was 20m below ground level
Due to rain water, the level of water present in well was raised by 5 m.
Now the depth of water
= 20 – 5
= 15 m
Also the fixed pulley is fixed above the well is the height of 80 cm i.e. 0.8 m
The minimum length of the rope required
= 1.2 + 15 + 0.8
= 17 m
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