NA Aw e Mollame 2 th diameter has a path mile un een heel grewing the path at spare more behet

A circular park, 24m in diameter , has a path 3.5 m wide running round it on the outside. Find the cost of gravelling the path at Rs. 20 per m^(2) .

If a body is moving withuniform speed of 10 m//s on a circular path of diameter 2 m , then the difference between the distance covered by it and displacement un half revolution will be

A circular park whose diameter is 210 m has a 5 m wide path running around it (on the outside). What is the area (in m^(2) ) of the path?

A glass sheet 12xx10^(-3) mm thick (mu_(g)=1.5) is placed in the path of one of the interfering beams in a Yongs's double slit interference arrangement using monochromatic light of wavelenght 6000 A. If the central bright fringe shifts a distance equal to width of 10 bands. What is the thickness of the sheet of diamond of refractive index 2.5 that has to be introduced in the path of second beam to bring th ecentral bright fringe to original position?