draw a line segment PQ. Without measuring PQ, construct a copy of PQ.
draw a line segment PQ. Without measuring PQ, construct a copy of PQ.
draw a line segment PQ. Without measuring PQ, construct a copy of PQ.
P and Q can do a piece of work in 20 days and 12 days respectively. P started the work alone and then after 4 days Q joined him till the completion of the work. How long did it take for the work to be completed?