Profit and Loss Practice Test 6

Question : 15 of 40

Marks: +1, -0

A trader purchases a watch and a wall clock for Rs 390. He sells them making a profit of 10% on the watch and 15% on the wall clock. He earns a profit of Rs 51.50. The difference between the original prices of the wall clock and the watch is equal to:

Rs 80
Rs 120
Rs 110
Rs 100

Validate

Solution:

Watch	Wall Clock	CP	SP
x	y	x + y = 390	-
$x+x/10=11/10x$	$y+ 15 /100y=115/100y$	-	390 + 51.5= 441.5

x + y = 390

......(i)

11/10x+115/100y=441.5

110x+ 115y= 44,150

......(ii)
Equating equation (i) and multiplying with 110 and subtracting from (ii); we get:
y = 250
CP of wall clock y = 250
CP of watch = 390 - 250 = 140
Difference between the original prices of wall clock and watch is equal to = 250 - 140 = Rs 110.

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