Question

If a magnification of -0.75is to be obtained by using a converging lens of focal length 8cm, then the object must be place?​

Answer 1

Answer:-

Let the number of chairs she purchased be n.

Cost of 1 chair =Rs.250

Cost of 1 teble =Rs.400

Now according to the question-

250×x+400×2=2800

250x+800=2800

⇒250x=2800−800

⇒x=

250

2000

=8

Hence the no. of chairs she purchased is 8.

hope it helps.♡

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