If a pipe fills a tank in $$n$$ hours, then the work done by the inlet in 1 hour is $$\frac{1}{n}$$.
True
False
If 56 men can do some work in 42 days, then 168 men will finish the same work in 12 days.
True
False
The work done by the inlet is always positive whereas the work done by the outlet is always negative.
True
False
The weight of a rock and the force required to move it are in inverse variations.
True
False
The height at which a kite is flying and the length of the thread attached to it are in direct variation.
True
False
Height of a child and his weight as he grows are in direct variation.
True
False
Wages of a worker and the number of hours of work show inverse variation.
True
False
The number of students and the fees paid by them show direct variation.
True
False
Click the correct answer.
The quantity of rice sold by two shopkeepers is in the ratio 3 : 5. If the second shopkeeper sold 25 kg of rice, how much rice did the first shopkeeper sell?
18 kg
15 kg
20 kg
12 kg
If 30 men take 10 days to build a wall, how many days will 25 men take to build the same wall?
13 days
11 days
12 days
14 days
Given that x is in inverse variation with y. If x is 8 and the constant of variation is 48, then what is the value of y?
9
13
12
6
Pinky bought 15 roses for ₹ 240. What is the cost of 10 roses?
₹ 160
₹ 155
₹ 150
₹ 165
If p = 4q, then what is the relation between p and q?
Vary inversely with each other
Vary directly with each other
Insufficient information
None of these
If 2 men can do a piece of work in 10 days, how many men are needed to complete the work in 5 days?
5 men
8 men
4 men
6 men
Aman can finish a work in 18 days. Priya can do the same work in half the time taken by Aman. Working together, what fraction of the same work can they finish in a day?
$$\frac{2}{5}$$
$$\frac{1}{9}$$
$$\frac{2}{7}$$
$$\frac{1}{6}$$
If 10 computer operators can type 120 pages in 2 hours, how many operators should work if the job is to be completed in 30 minutes?
40 operators
45 operators
50 operators
55 operators
Click the correct answer.
If two quantities $$x$$ and $$y$$ vary in such a manner that $$\frac{x}{y}$$ is
and positive then $$x$$ and $$y$$ are said to be in direct variation.
constant
negative
non-constant
If $$\frac{5}{15}=\frac{7}{x}$$, then the value of $$x$$ is
.
15
14
21
If $$\frac{2.5}{y} = \frac{7}{28}$$, then the value of $$y$$ is
.
10
18
20
The time of the journey is in
variation with the speed of the car.
partially direct
direct
inverse
If xy = 48 and y = 6, then x =
.
6
8
7
If pq = 156 and p = 8, then q =
.
19.5
9.5
17.5
Time is
proportional to work.
directly
indirectly
positively
If an outlet empties a full tank in
hours, then work done by it in 1 hour is $$\frac{-1}{n}.$$
n + 1
–n
n
If Murshid can do a piece of work in 20 days, he can do $$\frac{1}{5}$$of the work in
.
