একটি ব্যাগে 1:2:3 অনুপাতে 25 পয়সা 10 পয়সা এবং 5 পয়সা কয়েন থাকে যদি তাদের মোট মূল্য হয় টাকা...

hoblem -3 x 68.5 40 30 x 10 -40 685 30 40 22.83 62.83 Average marks is 62.83 lem the average marks from the following distribution iculate 10-15 15-20 20-25 30 30-35 rks 5-10 No. of students tion, Marks (CH) No. student (f) Midvalue(x) d Fd 2.5 5-10 10-15 125 15-20 20-25 225 +1 25-30 27.5 2 +15 30-35 +3 32.5 25 Using step deviation formula Assumed Mean (A) 17.5 Common factor (i is 5 30 x 5 17.5 17.5 17.5 t 1.2 18.7 llinnon four An were 5's, 30 were 6's and the 540

In which of the following tables a and b vary directly? (i) a, 7, 9, 13, 21, 25 b, 21, 27, 39, 63, 75 (ii) a, 10, 20, 30, 40, 46 b, 5, 10, 15, 20, 23 (iii) a, 1^2 , 2^2 , 3^2 , 4^2 , 5^2 b, 1^3 , 2^3 , 3^3 , 4^3 , 5^3

(i) (x ^ (3) + 2x ^ (2) + 3x) -: 2x (ii) (10x-25) - :( 2x-5) (iii) (x (x + 1) (x + 2 ) (x + 3)) - :( x (x + 1))

The density of a uniform steel wire of mass 1.6 xx 10^(-2) kg , and length 2.5 m is 8 xx 10^(3) kg//m^(3) . When it is loaded by 8kg, it elongates by 1.25 mm. If g = 10 m//s^(2) , then the Young's modulus of the material of the wire is

Identify the reaction order form each of the following rate constants: a. k = 7.06 xx 10^(-3) mol L^(-1) s^(-1) b. k = 5.6 xx 10^(-5) s^(-1) c. k = 1.25 xx 10^(-2) mol^(-1)l s^(-1) d. k = 1.25 xx 10^(-2) mol L^(2)s^(-1) e. k = 5.0 xx 10^(-6) atm^(-1)s^(-1)

If log,3 9log,410 log,8x then x (1) 5 (2) 1110 (4) 25 (3) 10

What is the volume occupied by 8 grams of oxygen in m^3 at 3 atm and 27^oC ? (a) 2.05 X 10^-3 (b) 4.1 X 10^-3 (c) 2.5 X 10^-3 (d) 4.2 X 10^-3

A 3000 cm^(3) tank contains oxygen at 20^(@)C and the gauge pressure is 2.5 xx 10^(6) Pa . Find the mass of the oxygen in the tank. Take 1 atm = 10^(5) Pa .