Amrita bought some pens for Rs 360. When the price was reduced by Rs 3, she could buy 6 more pens for the same cost of Rs360. Find the original cost of the pen
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Answered by
4
Answer:
Step-by-step explanation:
let,no of pen is x
and cost of pen is y
from the first condation
xy=360
from the sec cond
(y-3)(6+x)=360
y(6+x)-3(6+x)=360
6y +xy-18-3x =360
put xy=360
6y+360-18-3x=360
6y+ 342-3x=360
-3x+6y=18 take 3 common
-x+y=6
put x=360/y
-360/y+y=6
y=6y/360
Answered by
13
Answer:
no. of pens she bought = x
Rs. = 360
Cost 1 = 360/x
No. of pens she could have bought = x + 6
Rs. = 360
Cost 2 = 360/( x + 6 )
C 1 is greater than C 2 by 3
C1 = C2+3
x = -30 x = 24
No. of pens she bought is 24.
Cost = 360/24
= 60/4
= 15 rs.
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