Question

A can do as much work in 5 days as B in 6 days if both of them together can do the work in 12 days in how many days can each of them complete the work. Find it

Answer 1

Structure of solids

Different types of bonding- ionic, covalent, metallic, van der Waals and hydrogen. Band theory of solids,

Periodic potential and Bloch theorem, Kronig-Penny model, energy band structure. Band structure in

conductors, direct and indirect semiconductors and insulators (qualitative discussions); free electron

theory of metals, effective mass, drift current, mobility and conductivity, Wiedemann-Franz law. Hall

effect in metals : Phenomenology and implication.

Answer 2

Answer:

(A+B)'s 1 day work = 1/4

A's 1 day work = 1/12

B's 1 day work =

(14−112)=3−112=16

So B alone can complete the work in 6 days