Question

kaushal and nainsuk while working together can compleate a piece of work in 64 days while nikel alone compleate do it in 96 days.how long kaushal take to compleate the work alone?
(a)216 hours
(b)192 hours
(c)183 hours
(d)174 hours

Answer 1

$\frac{1}{Kaushal \: work} + \frac{1}{nainsukh \: work} = \frac{1}{64}$

so after solving you get

$\frac{1}{x} = \frac{1}{64} - \frac{1}{96}$

X = 38.4 days

X = 918 hours

:)