Cost of an item is x. It's value increases by p% and
decreases by p% Now the new value is 1 rupee, what is the
actual value ?

Answer Posted / phaniram

Let the item cost be I then,

Item cost by increasing p% will be:
I(100+p)/100

Item Cost by decreasing p% will be:
I(100+p)(100-p)/100*100

But the above is equal to 1.

So,

I(100^2-p^2)/100^2 = 1 => I = 100^2/(100^2 - p^2).

Is This Answer Correct ?    24 Yes 9 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

In a well of 20feet depth, a frog jumps 5feet up in the morning and comes 4feet down in the evening, on which day the frog gets out of the well.

867


Find the distance when they meet from starting point.

732


The size of a program is N. And the memory occupied by the program is given by M = square root of 100N. If the size of the program is increased by 1% then how much memory now occupied?

989


A salesperson by mistake multiplied a number and got the answer as 3, instead of dividing the number by 3.What is the answer he should have actually got?

849


Ravi's salary was reduced by 25%.Percentage increase to be effected to bring the salary to the original level is

997






Draw venn diagram relating rhombus, quadrilateral & polygon

858


There is a safe with a 5 digit number as the key. The 4th digit is 4 greater than second digit, while 3rd digit is 3 less than 2nd digit. The 1st digit is thrice the last digit. There are 3 pairs whose sum is 11. Find the number.

697


An equilateral triangle of sides 3 inch each is given. How many equilateral triangles of side 1 inch can be formed from it?

935


A train blows a siren one hour after starting from the station. After that it travels at 3/5th of its speed it reaches the next station 2 hours behind schedule. If it had a problem 50 miles farther from the previous case,it would have reached 40 minutes sooner. Find the distance between the two stations .

680


Two trains 100 meters and 120 meters long are running in the same directions with speed of 72 km/hr and 54 km./hr. in how much time will the first train cross the second?

797


Two persons start at the same point, walk in opposite directions with 5km/hr and 5.5km/hr respectively. What is the distance separated after 2 and half hrs?

1372


Radha,Geeta&Revathi went for a picnic.After a few days they forgot the date,day and month on which they went to picnic.Radha said that it was on Thursday,May 8 and Geeta said that it was Thursday May 10.Revathi said Friday Jun 8.Now one of them told all things wrongly,others one thing wrong and the last two things wrongly.If April 1st is tuesday what is the right day,date and month? thought that he should not waste his time and started moving towards his residence at the speed of 3mi/hr.On the way,he gets the coach and reaches home at 6 o'clock.How far is his residence from railway station.

881


I need Matrix and Series questions with solutions.

1783


Two chords of lengths L1 and L2 are drawn in a circle. Their lengths are inversely proportional to the straight distance joining the centre.Find the radius of circle.

784


Scientific publishing aptitude interview question

996