The cost of 5 litres of petrol is ₹ 110 then the cost of 8 litres is …………….. 

Correct option is  A) 220 A

Correct option is (D) Rs \(18\frac{3}{4}\) \(\because\) Cost of \(5\frac{2}{5}\) litres of milk = Rs \(101\frac{1}{4}\)  \(\Rightarrow\) Cost of \(\frac{27}{5}\) litres of milk = Rs \(\frac{405}4\) \(\therefore\) Cost of 1 litres of milk = Rs \((\frac{405}4\div\frac{27}5)\) = Rs \((\frac{405}4\times\frac5{27})\) = Rs \((\frac{45}4\times\frac5{3})\) = Rs \((\frac{15\times5}4)\) = Rs \(\frac{75}4\) = Rs \(\frac{18\times4+3}4\) = Rs \((18+\frac34)\) = Rs \(18\frac{3}{4}\).

C) both ‘A’ and ‘B’

Correct Answer - ₹5,₹8,₹8

Let the cost of 1 pen be ‘a’ and the cost of 1 pencil be ‘b’. Given, 5 pens and 6 pencils together cost Rs 9. 5a + 6b = 9 --------- (1) Given, 3...

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Correct Answer - B Make algebraic equation and proceed

Correct Answer - B `W=-2.303 nRT "log" V_(2)/V_(1)`