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Answer

from the given data

no. of boxes dameged =     2%

loss per damaged box=  35 Rs

total loss due to damage = 700 Rs

no. of boxes damaged= total loss/ loss per one damaged box

                                  = 700/35

                                 =  20 

therfore we have 20 boxes damaged , from this 

if 20 boxes are equal to 2% then 

100% of boxes are equal to 1000 right!

 so from above,  I concluded that , total shipment is 1000 boxes.

Answer

Dia of Nucleus =  1.56*10^(-16) m = diastance of light travelled 

Light speed    =  3*10^8 m/s

speed            = distance/ time

time               =  distance / speed

                     =   1.56*10^(-16)  / 3*10^8

                   = 5.2e-35 sec.