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
\(\therefore 20\times x=30\times9\)
\(\Rightarrow x=\frac{30\times9}{20}=\frac{27}2\,days\) \(=13\frac12\,days\)