Advertisements
Advertisements
Question
Water level in a well was 20 m below ground level. During rainy season, rain water 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 1 m 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 ______.
Options
17 m
18 m
96 m
97 m
Advertisements
Solution
Water level in a well was 20 m below ground level. During rainy season, rain water 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 1 m 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 17 m.
Explanation:
Height of the wall of the well = 1 m 20 cm = 1.20 m
Height of the pulley = 80 cm = 0.80 m
∴ Required minimum length of the rope
= (20 – 5 + 1.20 + 0.80) m
= (15 + 2) m
= 17 m
APPEARS IN
RELATED QUESTIONS
Write the opposite of the following: 10 km above sea level
Find the sum of: 137 and −354
Simplify: [37 − (−8)] + [11 − (−30)]
Find 34 − (−72) and (−72) − 34. Are they equal?
On a day in Srinagar, the temperature at 6 p.m. was 1°C but at midnight that day, it dropped to −4°C. By how many degrees Celsius did the temperature fall?
Find the product: (−8) × 3 × 5
Write (T) for true and (F) for false for the following statement:
20 ÷ (−5) = −4
Which of the following is a true statement?
−4 < −3
Number of integers lying between –1 and 1 is ______.
Height of a place A is 1800 m above sea level. Another place B is 700 m below sea level. What is the difference between the levels of these two places?
