Question

water level in a valve of 20 metre below the ground level during rainy season and water collected in different water tanks who was their needs into the well and the water level rises 5 metre above the previous level the wall of the water is 120 cm high and Pulley succeed at a highest of 80 centimetre Raghu wants to draw water from the well what is the minimum length of the rope that he can use

Answer 1

Correct Question:

• Water level in a well was 20m below ground level. During rainy season, rain water collected in different water tanks was drained nto the well and the water level rises 5 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. The minimum length of the rope that he can use is?

AnSwer:

After water level rises 5 m above the previous level,

Present water level is$\sf\:(20 - 5) = 15 m$below the ground level.

Now,

★Height of the pulley from the ground level =

$\implies \sf \: 1 m \: 20 \: cm + 80 cm$

$\implies \sf \: 1.2 \: m + 0.8 \: m$

$\implies \sf \: 2 \: m$

Therefore,

★The minimum length of the rope =

$\implies\sf \: 15 \: m + 2 \: m$

$\implies \sf 17 \: m.$

So, minimum length of the rope that he can us is 17 m.