উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
50
Remaining days = 30 - 20 = 10 days
Remaining work = 100% - 50% = 50%
Now, 50% work can be completed in 20 days by 50 workers
So, 50% work can be completed in 10 days by 50 x 20 / 10 = 100 workers
Therefore, additional workers needed = 100 - 50 = 50