Question

if a man loses 20% by selling 10 pencils for 10 rupee. how many pencil should he sell for 12 rupee to gain 20% pf profit?​

Answer 1

Step-by-step explanation:

sp of 1 pencil = 10/10 =1

l = 20%

cp = sp/(1-l%) = 1/0.8 = 1.25

sp = cp(1+g%) = 1.25×1.2 =1.5

sp of 1 pencil = 1.5 rupees

for 12 rupees no. of pencils = 12/1.5 = 8 pencils