Question

by selling a flower vase for 600, a shopkeeper gains 15%. Find its cost price.​

Answer 1

Answer:

Let the cost price be x Rs., then ;

s.p = (%gain/100)+c.p

600 =x+ (15/100)×x

600 = x+(3/20)x

600 = (23/20)x

x = 600×20/23

x = 12000/23

x = 521.73

therefore the cost price is Rs. 521.73

Answer 2

Answer:

$SP = Rs \:600 \:$

$Gain \% = 15\%$

$CP = \frac{100 }{ (100 + gain\% )} \times SP$

$\: \: \: \: \: \: \: \: = Rs \: \frac{100}{(100 + 15)} \times 600$

$\: \: \: \: \: \: \: \: = Rs\: \frac{100}{115} \times 600$

$\: \: \: \: \: \: \: \: = Rs\: \frac{20}{23} \times 600$

$\: \: \: \: \: \: \: \: = Rs\: \frac{12000}{23}$

$\: \: \: \: \: \: \: \: = Rs\: 521.73$