Home » Aptitude » Elementary Algebra » Question
  1. Area of the trapezium formed by x-axis; y-axis and the lines 3x + 4y = 12 and 6x + 8y = 60 is:
    1. 37.5 sq. unit
    2. 31.5 sq. unit
    3. 48 sq. unit
    4. 36.5 sq. unit
Correct Option: B

As per the given question , we have
For 3x + 4y = 12,
By putting x = 0, y = 3
By putting, y = 0, x = 4
For 6x + 8y = 60,

By putting x = 0, y =
15
2

By putting y = 0, x = 10
∴ Area of ∆ OCD =
1
x OD x OC
2

Area of ∆ OCD =
1
x 10 x
15
=
75
22
2
∴ Area of ∆ OAB =
1
x OB x OA =
1
x 4 x 3 = 6
22
∴ Area of trapezium =
75
- 6
2

Area of trapezium =
75 - 12
=
63
= 31.5 sq. unit
22



Your comments will be displayed only after manual approval.