Chain Rule MCQ Set 3

Showing question 11 to 15 of total 30 MCQs

Solve the question on your notebook and check it by clicking (Answer and Explanation) below question.

Question No: 15

Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?

1. 648
2. 1800
3. 2700
4. 10800

Answer: B

Explanation

Let the required number of bottles be x.

More machines, More bottles (Direct Proportion)

More minutes, More bottles (Direct Proportion)

Question No: 11

10 men, working 6 hours a day can complete a work in 18 days. How many hours a day must 15 men work to complete the work in 12 days ?

1. 4 hours a day
2. 5 hours a day
3. 6 hours a day
4. 7 hours a day

Answer: C

Explanation

More Men, Less Hours {Indirect Proportion}

Less Days, More Hours {Indirect Proportion}

Question No: 12

In a hostel, Food was available for 2000 students for 54 days, but after 15 days more students joined hostel and food lasts only for 20 more days. Determine how many students came in hostel ?

1. 1650
2. 1700
3. 1900
4. 2100

Question No: 13

3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

1. 9
2. 10
3. 11
4. 12

Answer: D

Explanation

Let the required number of working hours per day be x.

More pumps, Less working hours per day (Indirect Proportion)

Less days, More working hours per day (Indirect Proportion)

Question No: 14

If the cost of x meters of wire is d rupees, then what is the cost of y meters of wire at the same rate?

1. Rs.(xy/d)
2. Rs. (xd)
3. Rs. (yd)
4. Rs.(yd/x)