Advertisements
Advertisements
प्रश्न
A mango tree was planted 3 years ago. The rate of growth is 20% per annum. If at present, the height of the tree is 1 m 8 cm, how high was it when planted?
Advertisements
उत्तर
Vn = 1m 8 cm = 108 cm; V0 = ? ; t = 2 years; r = 20 %
`"V"_"n" = "V"_0 (1 - "r"/100)^"n"`
108 cm = V0 `(1 + 20/100)^3`
V0 = 108cm x 0.8333 x 0.8333 x 0.8333
V0 = 62.5 = m
The height of tree was 62.5 cm when planted.
संबंधित प्रश्न
The simple interest on a certain sum in 2 years is Rs 1,300, whereas the compound interest on the same sum at the same rate and for the same time is Rs 1,365. Find the rate per cent and the sum.
Anand borrows Rs 20,000at 9 % p.a. simple interest for 3 years. He immediately gave it to Prakash at `8 1/2 %` p.a. compound interest compounded annually.
Find Anand's loss or gain.
Find the difference between the compound interest compounded yearly and half-yearly for the following:
Rs 20,000 for `1 1/2` years at 16 % p.a.
The population of a city is 1, 25,000. If the annual birth rate and death rate are 5.5% and 3.5% respectively, calculate the population of the city after 3 years.
The population of a village increases at the rate of 50 per thousand. Its population after 2 years will be 22,050. Find the present population.
The population of a city is 24,000. In the next 3 years it will be 27,783. Find the rate of growth of the population.
A new car is purchased for Rs 4, 00,000 .Its value depreciates at the rate of 10% per annum. What will be its value after 4 years?
The cost of a T.V. was quoted Rs 17,000 at the beginning of the year 1999. In the beginning of 2000 the price was hiked by 5%. Because of decrease in demand the cost was reduced by 4% in the beginning of 2001. What is the cost of the T.V. in 2001?
Find the Compound Interest on Rs. 2,000 for 3 years at 15% per annum Compounded annually.
A sum of money amounts to ₹ 2,240 at 4 % p.a., simple interest in 3 years. Find the interest on the same sum for 6 months at 3`(1)/(2)`% p.a.
