chain rule shortcut method - Wikitechy https://www.wikitechy.com/interview-questions/tag/chain-rule-shortcut-method/ Interview Questions Mon, 06 Sep 2021 07:26:11 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png chain rule shortcut method - Wikitechy https://www.wikitechy.com/interview-questions/tag/chain-rule-shortcut-method/ 32 32 If 4 men reap 40 acres in 30 days, how many acres will 18 men reap in 12 days ? https://www.wikitechy.com/interview-questions/chain-rule/if-4-men-reap-40-acres-in-30-days-how-many-acres-will-18-men-reap-in-12-days/ https://www.wikitechy.com/interview-questions/chain-rule/if-4-men-reap-40-acres-in-30-days-how-many-acres-will-18-men-reap-in-12-days/#respond Tue, 17 Aug 2021 22:00:44 +0000 https://www.wikitechy.com/interview-questions/?p=1983

If 4 men reap 40 acres in 30 days, how many acres will 18 men reap in 12 days ?

A. 57 Acres

B. 64 Acres

C. 76 Acres

D. 72 Acres

Answer : D. 72 Acres

Explanation:

By Direct approach :
More men, more acres
More days, more acres
so,
4 / 18 : 30 / 12 = 40 / x
x = (18 x 12 x 40) / (4 x 30)
72 acres

]]> https://www.wikitechy.com/interview-questions/chain-rule/if-4-men-reap-40-acres-in-30-days-how-many-acres-will-18-men-reap-in-12-days/feed/ 0 In a dairy farm, 20 cows eat 20 bags in 20 days. In how many days one cow will eat one bag of husk ? https://www.wikitechy.com/interview-questions/chain-rule/in-a-dairy-farm-20-cows-eat-20-bags-in-20-days-in-how-many-days-one-cow-will-eat-one-bag-of-husk/ https://www.wikitechy.com/interview-questions/chain-rule/in-a-dairy-farm-20-cows-eat-20-bags-in-20-days-in-how-many-days-one-cow-will-eat-one-bag-of-husk/#respond Tue, 17 Aug 2021 22:00:00 +0000 https://www.wikitechy.com/interview-questions/?p=1982

In a dairy farm, 20 cows eat 20 bags in 20 days. In how many days one cow will eat one bag of husk ?

A. 10 days

B. 1/10 days

C. 20 days

D. 40 days

Answer : C. 20 days

Explanation :

Assume that in x days, one cow will eat one bag of husk.
More cows, less days (Indirect proportion)
More bags, more days (Direct proportion)
Hence we can write as
1 * 20 * x = 20 * 1 * 20

x = 20.

]]> https://www.wikitechy.com/interview-questions/chain-rule/in-a-dairy-farm-20-cows-eat-20-bags-in-20-days-in-how-many-days-one-cow-will-eat-one-bag-of-husk/feed/ 0 In a dairy farm, 40 cows eat 40 bags of husk in 40 days. In how many days one cow will eat one bag of husk ? https://www.wikitechy.com/interview-questions/chain-rule/in-a-dairy-farm-40-cows-eat-40-bags-of-husk-in-40-days-in-how-many-days-one-cow-will-eat-one-bag-of-husk/ https://www.wikitechy.com/interview-questions/chain-rule/in-a-dairy-farm-40-cows-eat-40-bags-of-husk-in-40-days-in-how-many-days-one-cow-will-eat-one-bag-of-husk/#respond Tue, 17 Aug 2021 21:50:57 +0000 https://www.wikitechy.com/interview-questions/?p=1976

In a dairy farm, 40 cows eat 40 bags of husk in 40 days. In how many days one cow will eat one bag of husk ?

A. 1

B. 1/40

C. 40

D. 80

Answer : C. 40

Explanation:

Assume that in x days, one cow will eat one bag of husk.
More cows, less days (Indirect proportion)
More bags, more days (Direct proportion)
Hence we can write as

In a dairy farm, 40 cows eat 40 bags of husk
    • 1 x 40 x x = 40 x 1 x 40
    x = 40.
]]> https://www.wikitechy.com/interview-questions/chain-rule/in-a-dairy-farm-40-cows-eat-40-bags-of-husk-in-40-days-in-how-many-days-one-cow-will-eat-one-bag-of-husk/feed/ 0