Compound Variation

Q. If 5 men can do a piece of work in 6 days, then how many men will finish the same work in 5 days?

1. 8 men
2. 6 men
3. 5 men
4. 4 men

Q. 40 workers working for 8 hours per day digs a hole of 1088$m^3$. If 45 workers work for 6 hours a day, then what volume of the hole they can dig?

1. $918m^3$
2. $818m^3$
3. $908m^3$
4. $928m^3$

Q. The relation
$\frac{A}{B}=constant$
implies indirect proportion.

1. True
2. False

Q. There is a provision for 12 students for 10 days. If the number of students is increased to 15, then the provision will last for days.

1. 8
2. 10
3. 9

Q. In $E=M{C}^2$, E is inversely proportional to $C^2$.

1. True
2. False

Q.

Fill in the blank.

$$\begin{array}{ccccc}Price& 100& 75& 50& 25\\ Number& 60& 80& & 240\end{array}$$

1. 450

2. 120

3. 400

4. 350

Q. If 20 typists typing 5 hours a day can type a novel in 15 days, then, how many days will 15 typists working 6 hours a day can take to do the same job?

1. 18 days
2. 20 days
3. 19 days
4. 24 days

Q. If ₹42, 000 is spent on wages of 12 men working for 30 days, then what amount would have been spent if there were 18 men working for 24 days?

1. ₹50, 400
2. ₹50, 000
3. ₹55, 000
4. ₹48, 400

Q. In 25 days, one-fifth work is done by 10 men. If the number of days taken to complete three-fifth of the work is 75 days, then how many men were engaged?

1. 11 men
2. 12 men
3. 10 men
4. 8 men

Q. When A = 20, B = 10. Also, when A = 5, B = 40. What can we say about A and B?

1. They are inversely proportional.
2. A+B = constant
3. There exists no relation between A and B.
4. They are directly proportional.