8 men can dig a pit in 20 days. If a man works half more as much as a boy, then 4 men and 9 boys can dig a similar pit in- 8 आदमी एक गड्डा 20 दिन में खोद सकते है। यदि एक आदमी एक लड़के से आधा काम अधिक करता है तो 4 आदमी और 9 लड़के उसी गड्ढे को कितने दिन में खोदेंगे?

8 men complete work in 20 days, so total work = 8 * 20 = 160 man-days. If a man works half more than a boy (1.5 times), then 4 men + 9 boys = 4 * 1.5 + 9 * 1 = 15 boys capacity. In man-equivalent: 15/1.5 = 10 men. Days needed = 160/15 ≈ 10.67 days OR if man=1.5 and boy=1, then 4*1.5+9*1 = 15, 8*1.5*20 = 240, time = 240/15 = 16 days. 'Half more' means 1.5 times, giving option D.