One litre of water can fill in cylinder A and two litres of water can fill in cylinder B. Then two litres of gas can fill in 

Correct option is  A) 7

Correct option is (D) 7 Let radius of cylinder be r cm. \(\therefore\) Circumference of base of cylinder = Length of rectangle \(\therefore\) \(2\pi r=44\) \(\Rightarrow\) \(r=\frac{44}{2\pi}=\frac{44\times7}{2\times22}\) = 7 \(\therefore\) Radius of the cylinder is 7 cm.

Correct option is (B) 2π xy cm2 r = x cm & h = y cm \(\therefore\) Curved surface area of cylinder \(=2\pi rh\) = \(2\pi\,xy\,cm^2\)

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 \(18\frac{3}{4}\).

Correct option is (B) ₹ 176 \(\because\) The cost of 5 litres of petrol = Rs 110. \(\therefore\) The cost of 8 litres of petrol \(=Rs\,(\frac{110}5\times8)\) \(=Rs\,(22\times8)\) = Rs 176

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