In a camp there is a food stock for 500 members for 70 days. If 200 more joined in the camp then for how many days the food stock is sufficient ? 

Correct option is (A) ₹ 3375 The cost of food per person per day \(=Rs\;\frac{6300}{35\times24}\) = Rs 7.5 \(\therefore\) Expenditure of 25 members for 18 days \(=Rs\;(7.5\times18\times25)\) = Rs 3375

Correct option is (A) 50 Food stock = 500 \(\times\) 70 = 35000 Let after 200 more joined the camp the food stock is sufficient for x many days. \(\therefore\) x (500+200) = 500 \(\times\) 70 \(\Rightarrow\) \(x=\frac{500\times70}{700}=50\) \(\therefore\) Food...

Correct option is (D) \(\frac{(a+1)^2}{a+2}\) Work done by (a+1) works in (a+1) days = (a+1) (a+1) \(=(a+1)^2\) Number of days required to complete the same work by (a+2) members \(=\frac{\text{Total work}}{a+2}\) \(=\frac{(a+1)^2}{a+2}\)

Correct option is (B) 36 \(\because\) Tailor will stitch in 4 days = 9 shirts \(\therefore\) Tailor will stitch in 16 days \(=\frac94\times16=9\times4\) = 36 shirts

Correct option is (B) 13 1/2 Work done to complete the wall = Work done by 30 labourers in 9 days = Work done by 20 labourers in x days \(\therefore 20\times x=30\times9\) \(\Rightarrow x=\frac{30\times9}{20}=\frac{27}2\,days\) \(=13\frac12\,days\)

Correct Answer - 20

Work done by A and B in 1 day=1/12 Work done by B and C in 1 day=1/15 Work done by C and A 1 day=1/20 Adding all the three,...