10 women do half of the total work in 20 days. How many more women will be required to complete the remaining work in 10 days ?

10

Formula to be used here,

\(\frac{M_1\;×\;D_1}{W_1}\) = \(\frac{M_2\;×\;D_2}{W_2}\)

where M = No. of women, D = No. of days, W = Work

⇒ \(\frac{10\;×\; 20}{0.5}\) = \(\frac{ M_2\; × 10}{0.5}\)

⇒ \( { M}_{2 } \) = 20 

⇒ 20 -10 = 10 women more needed to complete the remained work in 10 days.