The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is:
R.Prabhakaran said:
(Sun, Dec 26, 2010 11:35:12 PM)
Why multiply 2(3x+2x)=1600 ?
Divya said:
(Mon, Dec 27, 2010 04:55:39 AM)
Perimeter formule 2(l+b), so we are using.
Sankar said:
(Sat, Feb 19, 2011 07:41:37 AM)
You said perimeter is 2 (l*b) but in above step perimeter we found as 1600m.
How is it possible two perimeter with different ans?
Ashok said:
(Mon, Mar 7, 2011 11:44:56 AM)
instead of using perimeter just take the total distance as 10x coz length 2 times of 3x and breadth 2 times of 2x
add both u will get 10x
and just find x usin s=d/t
Manjula said:
(Wed, Mar 16, 2011 10:01:47 AM)
From where does 12000 and 60 come.
Chandrika said:
(Sat, Jun 4, 2011 12:03:44 AM)
Why multipty 2(3x+2x)=1600?
Hema said:
(Mon, Jul 25, 2011 08:03:03 PM)
Sankar you are wrong, the formula for perimeter is 2(l+b) =1600.
Then subs the value for l and b which means 2 (3x+2x) =1600.
6x+4x=1600 then x=160.
Tapas Sethy said:
(Wed, Sep 7, 2011 12:26:56 PM)
How length equal to 480 and breadth equal to 320?
Sathis said:
(Thu, Sep 15, 2011 01:43:18 AM)
Hi ashok just explain briefly.
How to apply in s=d/t.
Kavitha said:
(Thu, Dec 1, 2011 09:05:32 PM)
It is in the ratio of 3:2 so 160 x 3=480 and 160 x 2=320.
Sandip Mulmule said:
(Fri, Jan 13, 2012 02:28:37 PM)
means 3:2
(3*x)+(2*x)=1600
5(2x)=1600/5
2x=320
x=320/2
x=160
.: 3*160=480
.:2*160=320
m = 1600 m.
Length = 480 m and Breadth = 320 m.