A. i) Depriciation expense using Straight line method of depriciation is as follows:-

Depriciation expense= Original cost- residual value/ Useful life

= $6,00,000- $50,000/5= $ 1,10,000 per year

The table showing the carrying amount brought down and carried down and depriciation expense for the 5 years is as follows:-

Date	Balance b/d	Depriciation expense	Balance c/d
31st January,2019	6,00,000	1,10,000	4,90,000
31st January,2020	4,90,000	1,10,000	3,80,000
31st January,2021	3,80,000	1,10,000	2,70,000
31st January,2022	2,70,000	1,10,000	1,60,000
31st January,2023	1,60,000	1,10,000	50,000 (Residual value)

ii) Depriciation expense using Reducing Balance method of depriciation is as follows:-

When the cost of asset, residual value and useful life of an asset is given, then rate of depriciation is calculated as follows:-

r= 1-(S-C)^1/n

where, r= rate of depriciation

S= Residual value

C= Original cost

n= Useful life

r= 1-(50,000-6,00,000)^1/5

r= 40%

Date	Balance b/d	Depriciation rate	Depriciation expense	Balance c/d
31st January,2019	6,00,000	40%	2,40,000	3,60,000
31st January,2020	3,60,000	40%	1,44,000	2,16,000
31st January,2021	2,16,000	40%	86,400	1,29,600
31st January,2022	1,29,600	40%	51,840	77,760
31st January,2023	77,760	35.7%	27,760( Balancing figure)	50,000 (Residual value)

B. Corporate Governance is a system by which companies are directed and governed by the management in the best interests of the stakeholders and others ensuring better management,greater transparency and timely financial reporting.

The primary objectives of implementing corporate governance includes accountability, transparency and equality of treatment for all stakeholders. The main objective is to protect the long-term interest of the shareholders. A good corporate governance can lift up a company's influence and reputation.

For example:- HDFC Bank identifies the significance of good corporate governance which ensures the long-term interests of the shareholders.

C. The following errors that are not revealed by the unadjusted trial balance is as follows:-

i) Error of complete omission:- If the transaction is completely omitted, then it does not affect the trial balance.

ii)Error of principle:- It is an error which violates the fundamentals of book-keeping. For example:- Purchase of furniture is debited to purchase account instead of furniture account.

iii) Posting to Wrong account :- If the amount is credited to Jony account but in actual it is to be credited to James account, then these type of errors cannot be revealed in trial balance.