1)

The area ( in sq units) of the region {(x,y):x ≥ 0, x +y ≤ 3, x2 ≤ 4y and y ≤ 1+√x } is 


A) 5912

B) 32

C) 73

D) 52

Answer:

Option D

Explanation:

Required area

        =10(1+x)dx+21(3x)dx20x24dx

   19112019643_area.PNG

   = =[x+x323/2]10+[3xx22]21[x312]20

   =(1+23)+(623+12)(812)

   =53+3223=1+32=52sq.units