Question

A watch and a pen together costs ₹ 140. If the cost of the watch be 6 times the cost of the pen, the cost of the watch will be

Answer 1

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Total cost of watch and pen = Rs. 140

Let the cost of pen be x
So, cost of watch will be 6x

As we know
$6x + x = 140 \\ 7x = 140 \\ x = \frac{140}{7} \\ x = 20$
So, The cost of pen is Rs. 20
And The cost of watch
=6×20
=Rs. 120

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Answer 2

Hey !!

Let the cost of pen be X .

Therefore,

Cost of watch = 6X.

According to the question,

Cost of pen + Cost of watch = 140

X + 6X = 140

7X = 140

X = 20

Cost of pen = X = 20

And,

Cost of watch = 6X = 6 × 20 =120