Question

The price of an apple is twice that of an orange. The price of an orange is thrice that of a banana. If the price of an apple increases by 10%, price of an orange increases by 30% and the price of a banana increases by 20%. Find the percentage increase in the price of 20 apples, 20 oranges and 20 bananas.

Accepted Answer

B. Let price of banana = $x$. Price of orange = $3x$. Price of apple = $6x$. Original total price of 1 apple + 1 orange + 1 banana = $6x + 3x + x = 10x$. New price of apple = $6x 	imes 1.1 = 6.6x$. New price of orange = $3x 	imes 1.3 = 3.9x$. New price of banana = $x 	imes 1.2 = 1.2x$. New total price = $6.6x + 3.9x + 1.2x = 11.7x$. Percentage increase = $\frac{11.7x - 10x}{10x} 	imes 100 = 17\%$.

Percentage Increase in Total Price

Explanation

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