A boat moves downstream at the rate of 8 km/hr, and upstream at 4 km/hr. The speed of the boat in still waters is:

The value of \(\frac{(2.3)^3 + 0.027}{(2.3)^3 - 0.69 + 0.09}\) is

The value of (1 - √2) + (√2 - √3) + (√3 - √4) + ..... + (√15 - √16) is

The cube of 105 is

If \( x + \frac{1}{x} = 5 \), then the value of \( \frac{5x}{x^2 + 5x + 1} \) is

The cube of 997 is:

If ( x - 5)² + (y - 2)² + (z - 9)²= 0 , then value of (x + y - z) is

A motor cycle gives an average of 45 km per litre. If the cost of petrol is Rs. 20/litre. The amount required to complete a journey of 540 km is:

The simplest value of \(\frac{\sqrt{8} - 2\sqrt{12} + \sqrt{20}}{\sqrt{18} - 2\sqrt{27} + \sqrt{45}}\) is:

If P = 0.3 × 0.3 + 0.03 × 0.03 - 0.6 × 0.03 and Q = 0.54, then  \(\rm \frac{P}{Q}\) is equal to:

The value of \(\left(\frac{1}{2}\right)^{−2} \times\left(\frac{1}{3}\right)^{−2} \times\left(\frac{1}{4}\right)^{−2} \)  is

The solution of the equation \(\frac{2}{3 x-4}+\frac{2}{2 x-6}=0 \) is:

What will come in the place of question mark (?) in the given expression?

\(\sqrt{21+\sqrt{49}+\sqrt{64}} \space {\%\:of\:5000}=?\)