45. If perimeter is given max area will be of equilateral traingle A= √3/4*(44/3) Hence none of these

18. Solve by average (5*22.22 + 7*20)/12 =20.9

16.

14. A= 7:5 and B= 1:1 First we have to make these quantities equal 7+5=12 and 1+1=2 so we have to multiply 6 in B So now A= 7:5 AND B= 6:6 Now we...

Let mp of 60 articles be 60 RS. Discounted price = 60*(100-40)/100 =36rs On selling at 36 RS he gains 20% so we have to maintain same price Now 10 ...

3/4= k(4/5) Where k is rate of change K= 15/16 4/5= K×R WHERE R Is new ratio Putting value of k R= 64:75 ( answer)

let large ,super, jumbo popcorn be 7x, 17x, 16x respectively and large,super, jumbo chips be 6y, 15y, 14y total popcorn =7x+17x+16x=40x toal chips...