a shopkeeper sold a pen at loss of 20%. if he had sold it for rs 10 more, he would have gain 5%.find the cost price of pen

let sp of a pen be x

loss=20%

then CP = ( SP * 100 ) / ( 100 – percentage loss )

= x*100/80

=1.25x

Again

if sp= x=10

then profit =5%

CP = ( SP * 100 ) / ( 100 + percentage profit )

= (x+10)*100/105

= 20x+200/21

as cp is equal

1.25x= (20x+200)/21

26.25=20x+200

6.25x=200

x=32

Step-by-step explanation:

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

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