Advertisements
Advertisements
प्रश्न
A pipe can fill a cistern in 10 hours. Due to a leak in the bottom it is filled in 12 hours. When the cistern is full, in how much time will it be emptied by the leak?
Advertisements
उत्तर
\[\text{ When there is no leakage, the pipe can fill the cistern in 10 hours } . \]
\[\text{ Thus, the pipe can fill } \frac{1}{10}\text{ th part of the cistern in 1 hour .} \]
\[\text{ When there is leakage, the pipe can fill the cistern in 12 hours } . \]
\[\text{ Therefore, in case of leakage, the pipe can fill } \frac{1}{12}\text{ th part of the cistern in 1 hour } . \]
\[\text{ Thus, in one hour, due to leakge, } \left( \frac{1}{10} - \frac{1}{12} \right)\text{ th or } \frac{1}{60}\text{ th part of the cistern is emptied } . \]
\[\text{ Hence, the cistern will be emptied by the leakage in 60 hours } .\]
APPEARS IN
संबंधित प्रश्न
A mixture of paint is prepared by mixing 1 part of red pigments with 8 parts of base. In the following table, find the parts of the base that need to be added.
| Parts of red pigment | 1 | 4 | 7 | 12 | 20 |
| parts of base | 8 | .... | .... | .... | .... |
Rashmi has a road map with a scale of 1 cm representing 18 km. She drives on a road for 72 km. What would be her distance covered in the map?
Reema weaves 35 baskets in 25 days. In how many days will she weave 55 baskets?
Working 8 hours a day, Ashu can copy a book in 18 days. How many hours a day should he work so as to finish the work in 12 days?
In which of the following case, do the quantities vary directly with each other?
When two quantities are related in such a manner that, if one increases, the other also increases, then they always vary directly.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
The distance travelled by CNG bus and the amount of CNG used.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Number of students in a hostel and consumption of food.
The variable x varies directly as y and x = 80 when y is 160. What is y when x is 64?
Here is a keyboard of a harmonium: What is the ratio of black keys to all keys on the given keyboard.
