Question

please answer to above attachment..... ❤ ​

Answer 1

Answer:

Let the 15% and 9% be 15x and 9x respectively.

15x + 9x = 2160

24x = 2160

x = 90

So,

15x = 1350

And ,

9x = 810

Answer 2

Answer:

FIRST WATCH = 810Rs

SECOND WATCH = 1350Rs

Step-by-step explanation:

let the price of first watch be x

let the price of second watch be y

according to the question,

x + y = 2160--------------(i)

x + 15x/100 + y - 9y/100 = 2160--------------(ii)

115x/100 + 91y/100 = 2160

115x + 91y/100 = 2160

115x + 91y = 216000---------------(iii)

eq(i)×115=======

115x + 115y = 248400--------------(iv)

now,eq(iv) - (iii)

24y = 32400

y = 1350

tut therefore, x = 2160 - 1350 = 810

so, cost price of first watch(x) = Rs810

cost price of second watch(y) = Rs1350

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