Question

Cost of one apple is $3$ times the cost of an orange. If price of $3$ apples is $72$ then price of $6$ oranges will be Rs. _____

• A. $24$
• B. $36$
• C. $48$
• D. $72$

Answer 1

Answer: (C)

$48$

Cost of one apple $=y$
Cost of one orange $=x$
$y=3x$
There are $2$ variables $x$ and $y$
When $3y=72,y=\frac{72}{3}=24$
$x=\frac{y}{3}=\frac{24}{3}=8$
$\therefore$ Cost of $6$ oranges $=6x=6\times 8=48$