[rahimnathwani]

You don't need a cash flow statement to show revenue. And if the cash flow statement is prepared using the indirect method (start with net profit, and adjust non-cash items) it may not even show revenue at all.

[slededit]

You don't, but it works a hell of a lot better than a subset of a balance sheet at a single point in time.

[rahimnathwani]

Probably, but sometimes both will be equally useless.