Four persons A, B, C and D completed a task in \( \frac{2}{3} \) h, \( \frac{3}{4} \) h, \( \frac{4}{5} \)h and \( \frac{1}{5} \) h respectively. Who among the following took the highest amount of time to complete the task?
Identify the letter-pair that does NOT belong to the following group.
What is the value of the following expression?
\(\left(\frac{\sqrt{225}}{14}\right)\times\left(\frac{\sqrt{196}}{22}\right)\times\left(\frac{\sqrt{484}}{15}\right)\)