Question

a reduction of 21℅ in the price of rice makes aman to get 10.5kg more for rupees 100. find the reduction price per kg?​

Answer 1

Answer:

The reduction price per kg is Rs. 2.

Step-by-step explanation:

Let the original price of the rice be Rs. x / kg

After 21% of reduction, the new price of the rice is Rs. (79/100)x / kg

Now, from the question we can write,

{Price / (new price per kg)} - {Price / (original price per kg)} = 10.5

{100/(79/100)x} – {100/x} = 10.5

Or, (10000/79x) – (100/x) = 10.5

Or, (10000 – 7900) / 79x = 10.5

Or, 2100 / 79x = 10.5

Or, x = 2100 / (79 * 10.5)

Or, x = Rs. 2.532/kg  

∴ New price=79 x / 100 = (79 * 2.532) / 100 = Rs. 2/kg