Advertisements
Advertisements
Question
If two quantities x and y vary directly with each other, then ______
Options
`x/y` remains constant.
x – y remains constant.
x + y remains constant.
x × y remains constant.
Advertisements
Solution
If two quantities x and y vary directly with each other, then `underlinebb(x/y "remains constant")`.
Explanation:
If two quantities x and y vary directly with each other, then `x/y` = k = constant.
Since, in direct proportion, both x and y increases or decreases together such a manner that the ratio of their corresponding value remains constant.
Hence, `x/y` remains constant.
APPEARS IN
RELATED QUESTIONS
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 | .... | .... | .... | .... |
In a model of a ship, the mast is 9 cm high, while the mast of the actual ship is 12 m high. If the length of the ship is 28 m, how long is the model ship?
A and B can polish the floors of a building in 10 days. A alone can do \[\frac{1}{4}\] th of it in 12 days. In how many days can B alone polish the floor ?
Two taps A and B can fill an overhead tank in 10 hours and 15 hours respectively. Both the taps are opened for 4 hours and they B is turned off. How much time will A take to fill the remaining tank?
Ten men take 4 days to complete the task of tarring a road. How many days would 8 men take?
If the weight of 12 sheets of thick paper is 40 grams, how many sheets of the same paper would weigh 2.5 kilograms?
In which of the following case, do the quantities vary directly with each other?
If 45 persons can complete a work in 20 days, then the time taken by 75 persons will be ______ hours.
It is given that l varies directly as m. Find l, when m is 33.
A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 metres to reach the batsman?
