Question

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

Answer 1

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) 64

Solution:

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

= 10

Answer: (a)