Brain teaser! Hint at the end! #shorts #maths #puzzle

Kamala borrowed Rs 26,400 from a Bank to buy a scooter at a rate of 15% p.a. compounded yearly.What amount will she pay at the end of 2 years and 4 months to clear the loan? (Hint: Find A for 2years with interest is compounded yearly and then find SI on the 2nd year amount for (4)/(12) years )

Read the following short write-up and answer the questions at the end of it. In certain polar solvents PCl_(5) undergoes an ionisation reaction in which Cl^(-) ion leaves one PCl_(5) molecule and attach itself to another. 2PCl_(5)rarrPCl_(4)^(+)+PCl_(6)^(-) Select incorrect statement(s).

The following is an extract of the savings bank pass book of Mrinalini who has an account with Corporation Bank. Calculate the interrest accured on the account at the end of June, 2005 at 5% per annum. ltimg src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PS_MATH_X_C22_S01_001_Q01.png" width="80%"gt

In a hair pin modle of RNA which nitrogen base is present at the short end

A smooth circular tube of radius R is fixed in a vertical plane. A particle is projectid from its lowest point with a velocity just sufficient to carry it to th ehigest point. Show that the time taken by the particle to rach the end of the horizontal diameter is (sqrt(R)/(g))In(1+sqrt(2)) . Hint : intsectheta.dtheta=In(sectheta+tantheta)

A rigid rod of length l but of negligible mass has heavy mass m attached to one end and is hinged freely at the upper end. It is inverted and then released. What is its speed at the lowest point and what is the tension in the suspension at that instant ? When the same is released from the horizontal position, at what angle from the vertical will the tension in the suspension equal the weight ? [Hint : Consider conservation of energy and dynamics of circular motion]