Answer:
1>all transactions in relation to cash are recorded in cash book,but all petty expenses in relation to cash are recorded in petty cash book.
2>cash book can be classified into single column,double column,triple column,and petty cash book,but petty cash book can be classified into simple and analytical petty cash bonk.
3>total of cash expenses are not transferred anywhere else,but summarised total of petty expenses are transferred to the cash book.
4>there is no gmprest system in a cash book,but under imprest cash system,a fixed advance is collected from head cashier by petty cashier.
5>contra system effect double column or triple column cash book,but there is no place of contra system under petty cash