1.

Grassin a field can completely feed 20 cows or 30 goats for a day. The same field is sufficient to feed 8 cows and 12 goats for1). \(1\frac{1}{2}\) days2). \(1\frac{1}{3}\) days3). \(1\frac{1}{9}\)days4).

Answer»

⇒ 20 cows or 30 goats can eat GRASS for 1 day from field

⇒ 30 goats will eat grass for 1 day

⇒ 1 goat will eat grass for 30 DAYS

⇒ 20 cow = 30 goats

⇒ 1 cow = (30/20)

⇒ 1 cow = 3/2

⇒ Let x day for 8 cow and 12 goats same field will be sufficient

⇒ 8 cow + 12 goats = 8 (3/2) + 12

⇒ 8 cow + 12 goats = 24 goats

⇒ 1 goat will eat grass for 30 days

⇒ 24 goats will eat grass for (30/24)

⇒ 24 goats will eat grass for (11/4 days)

∴ 8 cows and 12 goats eat grass for (11/4 days)


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