Question

X and Y can do a piece of work in 12 hours and 15 hours respectively. If they work together how long will they take to complete the work?​

Answer 1

Answer:

here is the answer mate

$x + y \div 2 =12 + 15 \div 2 = 24 + 30 \div 2 = 54 \div 2 = 27$

they can complete in 27 hrs