For the following questions answer them individually
$$ Â Simplify:\sqrt \frac{(2.3)^2 + (23.3)^2 + (233.3)^2 }{ ( 0.23)^2 + (2.33)^2 + (23.33)^2} $$
Y is placed to the east of X, and Z is placed to the south of X. What is the direction of Z with respect to Y?
A spherical mirror and a thin spherical lens both have a focal length of -10 cm. The mirror and the lens are likely to be-
Two men—Pand start from two points—X and Y on opposite banks of still river towards Y and X respectively. They meet at 340 m from one bank 'X' and proceed on their respective onward journey. After that they meet at 170 m from the other bank 'Y' on their return journey. What is the width of the river?