Question

Price of petrol increased from Rs 60/litre to Rs. 75/litre. How much should the consumption of petrol be reduced (in %) increase expenditure by only 10%?​

Answer 1

Answer:

Step-by-step explanation:

Difference in price is 15

(15/75) * 100

= 20%

Consumption to be reduced by 20%

Answer 2

Consumption should be reduced by 12%

Step-by-step explanation:

Consider original expenditure of patrol = x liters,

If original price = Rs 60/liter,

So, original spending = 60x rupees,

Now, if the spending is increased by 10%,

Then new spending = 110% of 60x = 1.1(60x) = 66x,

Since, new price = 75/liter,

Consider y liter be the new expenditure,

So, new spending = 75y,

$\implies 75y = 66x$

$\implies y =\frac{66}{75}x$

Hence, the decrements in consumption = $\frac{\text{Original expenditure-New expenditure}}{\text{Original expenditure}}\times 100$

$=\frac{x-\frac{66}{75}x}{x}\times 100$

$=\frac{75-66}{75}\times 100$

$=\frac{9}{3}\times 4$

$=12\%$

#Learn more:

Manish Bought 1000 pencils for rs 3000 and sold 200 of these at a gain of 5%. at what gain percent he must sell the remaining pencil so as to gain 15% on the whole transaction?

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