A and B sold two articles at 25% profit and 40% profit respectively. If tot profit is rs. 178 and the cost price of A is rs 120 less than B.find the CP of B
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148.57
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let C.P of B= x
let C.P of A = x-120
profit of A= (x-120)*25/100
= (x-120)/4
profit of B=(x*40)/100
=x*2/5
(x-120)/4+x*2/5 =178
taking lcm of 4 and 5 =20
equation becomes 5x-600+8x =178*20
from here x=320
cp of B=320
cp of A=200
for checking, profit of B =320*40/100 =128
profit of A =200*25/100=50
128+50=178 total profit
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