Question

(d) an isosceles right triangle
A can do a work in 36 days and B in
12 days. If they work on it
together, then in how many days
will they be able to do the work?
(a) 8 days (b) 6 days
(c) 10 days (d) 9 days
Find the median of the​

Answer 1

$a \: and \: \:b \: \: can \: \: do \: work \: in \: one \: day \\ = \frac{1}{36} + \frac{1}{12} = \frac{1 + 3}{36} = \frac{1}{9} \\ so \: a \: and \: b \: can \: do \: complete \: work \\ \: in \: 9 \: days$