Draw any zabc. construct zpqr equal to zabc using a compass.

Q:

if a number 72k23l is divisible by 88. then find value of k and l ?

a)  k=8 & l=2
b)  k=7 & l=2
c)  k=8 & l=3
d)  k=7 & l=1

answer:     b) k=7 & l=2 

explanation:

if a number to be divisile by 88, it should be divisible by both "8" and "11"
check for '8' :
for a number to be divisible by "8", the last 3-digit should be divisible by "8"
here 72k23i --> last 3-digit is '23i'
so i=2 [ (i.e) 232 is absolutely divisible by "8"]
chech for '11' :
for a number to be divisible by "11" , sum of odd digits - sum of even digits should be divisible by "11"
(7 + k + 3) - (2 + 2 + i)
(7 + k + 3) - (2 + 2 + 2)
(10 + k) - 6 should be divisible by "11"
for k = 7
=> 17 - 6 = 11 [ is absolutely divisible by "11"]
so k = 7 , i = 2.

You asking the question.
 
you should also give the options that will be but still here is the answer.
first of all you should check  quadratic to know the area of rectangular so that it can be factorized easily.
as we know that area of rectangular is given by using  length and width( product of both) k2+19k+0 = (k+4)(k+15) 
where k + 15 mean length of rectangular k+4 means width of rectangular.
so width of rectangular is = k+ 4
length of rectangular is = k+15.
i hope will you.