If the cost of 7 kg of onions is Rs. 84. Find the cost of 3 kg of onions.
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Respuesta:
The answer is: 36 Rs.
Explicación paso a paso:
You just have to apply a rule called: "rule of 3". That is basically an simplification for the equation:
7kg/3kg = 84 Rs./x
Solving this equation:
x = (3*84 Rs.)/7 ; this implies that x = 36 Rs.
luismartinez004:
By the way, this kinds of problems are also related to the "proportions problems", wich are problems where you have to associate two magnitudes of different things.
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