Question
A boy sitting in a train moving with a uniform velocity
drops a coin outside. A man standing outside the train will find the trajectory of the coin to be -Solution
Parabola, because when the coin is dropped at a particular point, it has the same velocity as the running train. So, by Newton's first law, it continues its motion horizontally with that velocity.
- A bank offers interest at the rate of 10% per annum, compounded half yearly. Find the interest received at the end of the year on a sum of Rs. 30000.
Dev borrowed Rs. 6400 at R% S.I. and Rs. 5600 at (R + 5)% S.I. for 3 years. If the total interest came to Rs. 4800, find the rate applicable on Rs. 5600.
An investment of ₹15,000 is made for 4 years at an annual compound interest rate of 6%. After 2 years, ₹5,000 is withdrawn. Calculate the approxima...
The ratio of the compound interest earned on an amount of Rs. 'p' at an interest rate of 15% per annum for 2 years to the simple ...
A man deposited Rs. ‘x + 850’ at 12% per annum simple interest and earned Rs. 552 as interest after 2 years. Find the interest earned by him if he d...
Anuj invested Rs. ‘x’ at simple interest of 15% p.a. and Anil invested Rs. (x + 500) at simple interest of 10% p.a. If at the end of 2nd year, sum o...
A certain sum of money becomes 4 times of itself in 15 years at simple interest. In how many years does it become double of itself at the same rate of s...
The simple interest accrued in five years on a principal of Rs. 50,000 is one – tenth of the principal. What is the rate of simple interest...
Rs. 8800 is invested in scheme ‘A’ for a year at simple interest of 20% p.a. The interest received from scheme ‘A’ is reinvested for 2 years in ...
The difference between C.I and S.I on a certain sum for 3 years is Rs. 122 at 5% p.a. Then find the sum?
...
Relevant for Exams:
