Bikash purchased 10 pens. He sold 5 pens at 25% profit and the remaining 5 pens at 162% loss. If he received Rs 625 in total, find the cost price of each pen.​

Step-by-step explanation:

no.of pens=10

cp of i pen=x cp of 5 pens =5x

profit.A=25% of c.p= 0.25*5x=1.25x

profit= sp -cp

or, 1.25x=sp-5x

sp=6.25x

2nd condition

loss . amount= 0.833x

loss=cp -sp

or,0.833x=5x-sp

sp=4.17x

sp1+sp2=625

or,6.25x+4.17x=625

x=59.98 or 60

cost  price of i pen is Rs 60

the one that has a slope of 1/2 and is positive.

step-by-step explanation: 2 buckets 1 trip ; 4 buckets 2 trips and so on.