Question

What is the answers to the following questions:

1. 17*23
2. 18÷2
3. 15*8​

Answer 1

Answer:

1) 17×23 = 391

2) 18÷2 = 9

3) 15×8 = 120

Step-by-step explanation:

The object is placed at 40cm away from the converging mirror ( Concave mirror ) of Focal length 20 cm . Radius of curvature = 2F=2*20=40cm . Hence ,The object is placed at Centre of curvatute . We know that ,For a object placed at Centre of curvature ,The image is formed at the centre of curvature and of same size .27-Dec-2017

Answer 2

Answer:

correct answer of first question is 391.

1. 17*23

391

correct answer of second question is 9.

2. 18÷2

9

3. correct answer of third question is 120.

15*8

120