Chain Rule Practice Questions

5 questions per page • Detailed step-by-step solutions

Question 11
Easy
A canteen requires 651 bananas for a week. Totally, how many bananas will it require for the months of April, May and June?
A 8370 bananas
B 8463 bananas
C 8556 bananas
D 8649 bananas
Correct Answer: B

Explanation:

Daily requirement = 651 / 7 = 93 bananas/day. Total days in April, May, and June = 30 + 31 + 30 = 91 days. Total bananas = 91 * 93 = 8463 bananas.
Question 12
Medium
The cost of 16 packets of salt, each weighing 900 grams is Rs. 28. What will be the cost of 27 packets, if each packet weighs 1 kg?
A Rs. 48.50
B Rs. 52.50
C Rs. 54.00
D Rs. 56.50
Correct Answer: B

Explanation:

Total weight initially = 16 * 900 = 14400 gm = 14.4 kg costing Rs. 28. Cost per kg = 28 / 14.4. New total weight = 27 * 1000 = 27000 gm = 27 kg. Cost = 27 * (28 / 14.4) = (27 * 280) / 144 = 7560 / 144 = Rs. 52.50.
Question 13
Easy
Running at the same constant rate, 6 identical machines can produce a total of 180 bottles per hour. How many bottles could 15 such machines produce in 30 minutes?
A 200 bottles
B 225 bottles
C 250 bottles
D 300 bottles
Correct Answer: B

Explanation:

1 machine produces 180 / 6 = 30 bottles/hour. In 30 minutes (0.5 hour), 1 machine produces 15 bottles. 15 machines produce 15 * 15 = 225 bottles.
Question 14
Medium
If 12 carpenters, working 6 hours a day, can make 460 chairs in 24 days, how many chairs will 18 carpenters make in 36 days, each working 8 hours a day?
A 1260 chairs
B 1380 chairs
C 1420 chairs
D 1540 chairs
Correct Answer: B

Explanation:

(M1 * D1 * H1) / W1 = (M2 * D2 * H2) / W2 => (12 * 24 * 6) / 460 = (18 * 36 * 8) / W2 => 1728 / 460 = 5184 / W2 => W2 = 460 * (5184 / 1728) = 460 * 3 = 1380 chairs.
Question 15
Easy
In a school there is a meal for 60 girls or 100 boys. If 50 boys have taken their meal, how many girls will be catered with the remaining meal?
A 25 girls
B 30 girls
C 35 girls
D 40 girls
Correct Answer: B

Explanation:

100 boys = 60 girls => 1 boy = 0.6 girls. Remaining quota = 100 - 50 = 50 boys. Number of girls catered = 50 * 0.6 = 30 girls.