Question

9. 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 is
80 cm
1m 20 cm
(a) 17 m
(b) 18 m
(c) 96 m
(d) 97 m​

Answer 1

Answer:

17. 15 for depth and 1 m for pulley height , another 1 m for holding .