1:1 ?

Average of first n natural nos is (n+1)2=x next n nos will be n , n+1, n+2, n+3.......2n their sum =n*n+ n(n+1)/2 average ={n*n+ n(n+1)/2}/n average...

Alternatively Percentage increase will be the average of percentage increase in sides if perimeter is asked i.e (20+30)/2 = 25%

Let length =10 Width = 10 P= 40 Now length = 12 bredth = 13 P' = 50 So percentage increase =(10/40)*100= 25%

4th line R.H.S is 10(2 +(n-1)3)

Va at nth second will be = 2+(n-1)3 {since it forms an a.p with a=2 and d=3} Vb at nth second will be = 3+ (n-1)d Vb=10Va 3+(n-1)d= 10(2+(n-1...

97th answer is 5292 ?

98

M:W=2:3 after evaporating ratio becomes 1:1 ,since milk will not evaporate M:W=2:2 earlier 2 x+3x=5x=100 now 2+2= 4x=80lt i am getting 80 lt...

16) D = b^2- 4ac Any square is of the form 4k or 4k+1 So D can't be of the form 4k+3 hence option 1

x + 1/x = - √3 x³ + 1/x³ = 0 x^42 + x^48 + x^54 + x ^60 + x^66 + x ^72 = x^45(x³ + 1/x³) + x^57(x³ + 1/x³) + x^69(x³ + 1/x³) = 0