∵ 7 men clear the reservior in 20 days with initial quantity of water in the reservior is 24 kilo liter.
∴ Water flow into reservior(liter per day) = \(\frac{24000\times7}{20} \) liter per day = 8400 liter per days
Also, 5 men clear the other reservior in 50 days with initial
∴ water flow into other reservior = \(\frac{36000\times5}{50}\) litre per day
= 3600 litre per day