A circular ground of radius 7 m is surrounded by a path of width 3.5 m. Find the area of the path. (π = \( \frac{22}{7} \))
P, Q and R can do a work in 10, 15 and 30 days respectively. P works daily. Q and R together join P on alternate days starting the first day. In how many days will the work be done?
6 \( \frac{1}{3} \)
6 \( \frac{3}{4} \)
6 \( \frac{1}{2} \)
6