KaranSingh wrote:

question 1 : a cylinder with radius 5 inches placed upright in rectangular box of 8*10*12.what is the maximum possible volume of cylinder??/

ans :200*pie

question 2:if a, b , c are the roots of quadratic equations ,where c is common root.find the value of (X-a/X-b)??

KaranSingh - Please make sure to post the full questions - in separated posts and include the full answers. Otherwise you are hurting the other people's practice.

Good luck tomorrow.

Answer 1:

TIP (not related to this question directly) - given two sizes to choose from - a cylinder will have more volume if the bigger number is it's radius and not his height. (surface of the base is squared and height it not).

now - about question number 1 - few steps to follow -

radius 5 means that the diagonal is 10. therefore - the base can be ONLY the face with the 10*12 dimension.

all the other positions will not be able to hold a circle with radios of 5.

so - the height is 8.

(remember - cylinder's volume = the base's surface*height).

therefore:

base surface - Pie*r^2 = Pie * 25

Height is 8

so the full answer would be - 8*25*pie = 200*pie.

Question number 2 is not clear to me and it will be helpful if you post the answers.