Question

Water level in a well was 20 m below ground level. During rainy season, rainwater collected in different water tanks was drained into the well and the water level rises 5 m above the previous level. The wall of the well is lm 20cm high and a pulley afixed at a height of 80 cm. Raghu wants to draw water from the well. The minimum length of the rope, that he can use 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 1

Answer:

17cm

Step-by-step explanation:

After water level rises 5 m above the previous level, water level is now (20 - 5) = 15 m below the ground level.

Height of the pulley from the ground level = 1 m 20 cm + 80 cm

= 1.2 m + 0.8 m

= 2 m

Therefore, the minimum length of the rope = 15 m + 2 m

= 17 m.