Elitmus
Exam
a rectangular field has area equal to 150 sq m and perimeter 50 m its length and breadth must be?
option
a)10,5
b)5,10
c)none
d)15,10
e)10,15
Read Solution (Total 6)
-
- l*b=150sq.m,2(l+b)=50m
By solving these 2 eqns we get 2 values for l=15&10.In rectangle length is greater than breadth so l=15,b=10 - 10 years agoHelpfull: Yes(5) No(0)
- d) 15,10
If length=x, breadth=y
x*y=150 ---(i) &
2(x+y)=50 or x+y=25, y=25-x
Substituting in Eqn.(i), x(25-x)=150, 25x-x^2=150,
x^2-25x+150=0, (x-15)(x-10)=0, x=15, so y=10 - 10 years agoHelpfull: Yes(2) No(0)
- d is answer
- 10 years agoHelpfull: Yes(1) No(1)
- d is answer
- 10 years agoHelpfull: Yes(0) No(1)
- answer should be either d or e
2(l+b)=50,lb=150
- 10 years agoHelpfull: Yes(0) No(0)
- d is d answer
- 7 years agoHelpfull: Yes(0) No(0)
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