a can do a piece of work in 22 days and b alone can do it in 10 days . b works at it for 5 days and then leaves . a alone can finish the remaining work in
"explanation : b ' s 5 days work = 1 / 10 ∗ 5 = 1 / 2 remaining work = 1 − 1 / 2 = 1 / 2 a can finish work = 22 ∗ 1 / 2 = 11 days option c"
divide(const_1, add(divide(const_1, 22), divide(const_1, 10)))