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after striking the floor, a rubber ball rebounds to 4/5th of the height from which it has fallen.find total distance it travels before rest if it dropped from 120 metres. explain?

Chord AB of a circle when extended meets the tangent to the circle at point P. PT is the tangent touching the circle at point T. If lengths of PT and PB are 6 cm and 4 cm respectively, what is the length of PA?

What a waste! nobody is here to clear our doubts. I posted 4 questions, moreover also informed over chats. I even reported a few questions. Nobody cares.

where are the concepts of cubes and dices in CAT 2018 online course . i didnot find the concepts any where

where are the concepts of cubes and dices in CAT 2018 course

how it is taking ab to be 1 it is not mentioned in the question 

sir how to change language

the sum of first 4 terms of an ap is 28 and sum of first 8 terms is 88, find sum of 16 terms.people are telling answer 304 but i cannot understand shortcut shown in arun sharma book.....plss explain the method

the sum of first 4 terms of an ap is 28 and sum of first 8 terms is 88, find sum of 16 terms

Q.1   The students of a school stand in a rectangle for an assembly. Each row had 8 boys and each column had 10 girls. There were 16 empty spaces in the rectangle. What is the number of possible values for the total number of students in the school?

Q 2 A school allows either all white uniform or a combination uniform where one of the trouser or shirt is black and the other is white. In all there are 15 combination uniforms, 12 white trousers and 13 white shirts. What is the total number of students in the school?