Advertisements
Advertisements
प्रश्न
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 ______.
विकल्प
17 m
18 m
96 m
97 m
उत्तर
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
संबंधित प्रश्न
Write the number in the following example using the proper signs.
A submarine is at a depth of 512 metres below sea level.
Write the opposite of the following: 24
Indicate the following using '+' or '−' sign: 7°C below the freezing point
Add: -493 and 289
Subtract: 6240 from −271
Subtract the sum of −250 and 138 from the sum of 136 and −272.
What should be added to 16 to get (−31)?
An atom consists of charged particles called electrons and protons. Each proton has a charge of +1 and each electron has a charge of –1. Remember number of electrons is equal to number of protons, while answering these questions:
What is the charge on an atom?
From given integers in Column I match an integer of Column II so that their product lies between –19 and –6:
| Column I | Column II |
| –5 | 1 |
| 6 | –1 |
| –7 | 3 |
| 8 | –2 |
Write two integers such that one is smaller than –11, and other is greater than –11 but their difference is –11.
