nmodi

• Jul 17th, 2005

 

Ans. d 
8+4+2+1+0.5+0.25+0.125+0.0625+....  
total distance would be approx 16ft but cannot be exactly determined. Hence d.

sunita

• Dec 20th, 2005

 

the ans is 24ft

dist=8+2(4+2+0.5+0.25+....)=8+2*4/(1-1/2)=8+16=24

sivanarayan

• Jan 12th, 2006

 

ans : 8+2*(4+2+1)

anshul gupta

• Jun 20th, 2006

 

it is 24

pankaj

• Jun 20th, 2006

 

ans is 16 a/(1-r)8/(1-1/2)=16

prakash

• Jun 12th, 2007

 

What do you mean by the term "a/1-r"?

Bhoomika sharma

 Profile Answers by Bhoomika sharma Questions by Bhoomika sharma

• Dec 18th, 2008

 

Yes,it is easier to do by series progg method. according to this,if we have the first term as 8 ft and then as the ball bounces bak and so the series is obtained as:

8+(4+4+2+2+1+1+0.5+0.5+and so-on)
thus an infinite gp is formed with

(4+2+1+0.5+..)

=> 4/(1-1/2)=8
so 2(sum)=2*8=16+8=24

is the final answer.

John

• Mar 11th, 2013

 

8+2*(4/(1-0.5)) = 24 :)

chandra sekhar patra

• Jun 4th, 2014

 

H=e squre * h

8=e squre * (8/2)

=>e squre=1/2


now d=h*(1+e2/1-e2)
=>d=24ft