At what time 4 and 5 o’clock the hands of a clock coincide?

5 : 21 4 : 21\(\frac{9}{11}\) 4 : 32\(\frac{8}{11}\) 4 : 20\(\frac{5}{11}\)

4 : 21\(\frac{9}{11}\)

Formula  = \(\frac{60}{11}\) × (Initial hour) = \(\frac{60}{11}\) × 4  =  \(\frac{240}{11}\)  =  21\(\frac{9}{11}\)  minutes. So, correct answer is (1)  4 : 21\(\frac{9}{11}\)  o’clock