A machine is depreciated at the rate of 20% on reducing balance. The o...
Cost of machine (P) = Rs 1,00,000
Scrap value (A) = Rs 30,000
Rate of Depreciation = 20% per annum on reducing value
The effective life of the machine in years is the number of years in which P (Rs 1,00,000) would reduce to A (scrap value Rs 30,000) reducing at the rate of 20% per annum of the value at the start of that year year.
Value of the machine at time t= 0 years = P
The depreciated cost at end of one year = P[1 — 20%] = P[1 — 0.2] = P × 0.8
At the end of second year = P × 0.8²
At the end of 3rd year = P × 0.8³
And so on.
Let after n years the value depreciate to scrap value. We are required to find n.
P(0.8)^n = A
1,00000 (0.8)^n = 30,000
=> (0.8)^n = (30,000)/(1,00,000) = 0.3
Taking log of both sides
n log (0.8) = log (0.3)
=>n × (-0.09691) = (-0.52288)
=> n = (-0.52288)/(-0.09691)= 5.396 year ~5.4 years
View all questions of this test
A machine is depreciated at the rate of 20% on reducing balance. The o...
A machine deprecated at the rate of 20% on reducing balance.
The original cost of machine is ₹ 1,00,000.
At the end of
First year : 1,00,000 - (1,00,000 × 20%)
= 1,00,000 - 20,000
= 80,000
Second year : 80,000 - (80,000 × 20%)
= 80,000 - 16,000
= 64,000
Third year : 64,000 - (64,000 × 20%)
= 64,000 - 12,800
= 51,200
Fourth year : 51,200 - (51,200 × 20%)
= 51,200 - 10,240
= 40,960
Fifth year : 40,960 - (40,960 × 20%)
= 40,960 - 8,192
= 32,768
Sixth year : 32,768 - (32,768 × 20%)
= 32,768 - 6553.6
= 26,214.4
The ultimate scrap value of machinery is ₹ 30,000
At the end of Fifth year, the value of machinery is ₹ 32,768.
At the end of 5years, 6 months (approx.)
= 32,768 × 20/100 × 5.0685/12
= 2,768
Then, the scap value of machinery is :
>>> 32,768 - 2,768 = 30,000
The ultimate life of machinery is :
>>> 5.4 years (appx.)
>>> Option B
A machine is depreciated at the rate of 20% on reducing balance. The o...
Given:
Original cost of machine = Rs. 100000
Ultimate scrap value = Rs. 30000
Rate of depreciation = 20% on reducing balance
To find: Effective life of machine
Formula:
Depreciation = (Original cost - Scrap value) x Rate of depreciation
Effective life = Original cost / Annual depreciation
Calculation:
Annual depreciation = Original cost x Rate of depreciation
= Rs. 100000 x 0.2
= Rs. 20000
Let's assume the effective life of the machine is n years.
After n years, the book value of the machine will be equal to its scrap value.
So, we can write:
(Original cost - Depreciation for n years) = Scrap value
Rs. 100000 - Rs. (20000 x n) = Rs. 30000
Rs. 70000 = Rs. 20000 x n
n = 3.5 years
But this is the effective life of the machine assuming straight-line depreciation. Since the machine is depreciated at the rate of 20% on reducing balance, its effective life will be lesser than 3.5 years.
To calculate the effective life based on reducing balance depreciation, we can use the following formula:
Effective life = ln (Scrap value / Original cost) / ln (1 - Rate of depreciation)
where ln is the natural logarithm.
Effective life = ln (30000 / 100000) / ln (1 - 0.2)
= ln (0.3) / ln (0.8)
= 5.42 years (approx.)
Therefore, the effective life of the machine is approximately 5.4 years. Option (b) is the correct answer.