উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
30
3 women can do as much work as 2 men ∴ efficiency of women to do a piece of work, e2 = (1/3) ∴ efficiency of men to do a piece of work, e1 = (1/2) We know, Total work done = (no. of men or women) * (no. of days) * (no. of hours) * (efficiency) Therefore, m1 * d1 * h1 * e1 = m2 * d2 * h2 * e2 or, 15 * 21 * 8 * (1/2) = 21 * d2 * 6 * (1/3) or, d2 = 30 days