32 shirt pieces of 120 cm each can be cut from a reel of cloth. After cutting these pieces 80 cm of cloth remains. What is the length of reel of cloth in metres? (a) 38.70 metres (b) 39.20 metres (c) 3870 metres (d) 3920 metres (e) None of these

[" The unit of constant "k(k=(1)/(4 pi varepsilon_(0)))" is "],[" (newton "times" metre ")/" coulomb "],[" (newton "times" metre ")^(2)/" coulomb "^(2)],[" coulomb "^(2)/" (newton "times" metre "^(2)" ) "],[" (newton "times" metre "^(2)" )/ coulomb "^(2)]

There are two displacement vectors,, one of magnitude 3 metres and the other of 4 metres. How would the two vectors be added so that the magnitude of the resultant vector be (a) 7 metres (b) 1 metre and ( c ) 5 metres.

What will be the length of the diagonal of that square plot whose area is equal to the area of a rectangular plot of length 45 metres and breadth 40 metres? (a) 42.5 metres (b) 60 metres (c) 75 metres (d) Data inadequate (e) None of these

The top of a 15 metre high tower makes an angle of elevation of 60o with the bottom of an electric pole and angle of elevation of 30o with the top of the pole. What is the height of the electric pole? (a) 5 metres (b) 8 metres (c) 10 metres (d) 12 metres (e) None of these

epsilon_(0)E^(2) has the dimensions of ( epsilon_(0)= permittivity of free space, E= electric field) Here k= Boltzmann consant T= absolute temperature R= universal gas constant.

The speed of light in vacuum, c, depends on two fundamental constants, the permeability of free space, mu_(0) and the permittivity of free space, epsilon_(0) . The speed of light is given by c=(1)/(sqrt(mu_(0)epsilon_(0))) . The units for mu_(0) are