1.

A crane flying 6 m above a still, clear water lake sees a fish underwater. For thecrane, the fish appears to be 6 cm below thewater surface. How much deep should the craneimmerse its beak to pick that fish?For the fish, how much above the water surfacedoes the crane appear? Refractive index ofwater = 4/3.​

Answer»

Perfect QUESTIONS for guys INTERESTED in maths..2. The value of x + x(xx) when x = 2 is:(a) 10, (b) 16, (c) 18, (d) 36, (E) 64Solution:x + x(xx)Put the value of x = 2 in the above expression we get,2 + 2(22)= 2 + 2(2 × 2)= 2 + 2(4)= 2 + 8= 10ANSWER: (a)



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