Question

Ram bought apple at10 for rs 25 . How many apple must he sell for rs 50 to have a gain 25 %.

Answer 1

Apples in cp ₹ 15=10apples
CP=25 SP=50
Gain=25%
$cp = \frac{100}{100 + gain\%} \times sp$
$\frac{100}{100 + 25} \times 50 \\ \frac{100}{125} \times 50 \\ 40$
Answer 40 apple