ANSWER : 1/3

Explanation : : √(0.064-0.008)(0.16-0.04)/√(0.16+0.08+0.04)(0.4+0.2)³ Let x=0.4;y=0.2 √(x³-y³)(x²-y²)/ √(x²+xy+y²)(x+y)³ since (x³-y³)=(x-y)(x²+xy+y²) √(x-y)(x+y)(x-y)/(x+y)³=√(x-y)²/(x+y)² =x-y/x+y=0.4-0.2/0.4+0.2=1/3

ANSWER : 300%

Explanation : : Surface area of a cube = 6 x (side)² Let the side of cube='a' then its surface area =6a² new side of a cube=2a then its surface area=6(2a)²=24a² Percentage increase=24a²-6a²/6a²x100 =18a²/6a²x100=300%

ANSWER : Dhrupad

Explanation : : The Hindustani music system uses different musical forms like Dhrupad,Khyal etc,The Dhrupad is considered as one of the oldest forms of Hindustani vocal music.

ANSWER : a,c and e only

Explanation : which of the following cost is related to Marginal cost ? opt1:Prime cost opt2:Variable cost opt3:Fixed cost opt4:Implicit cost ans: Variable cost Exp: A variable cost is a cost that varies in relation to changes in the volume of activity. Variable cost affects the marginal cost of production

ANSWER : 23 h 56 min 4 sec

Explanation : : Earth's rotation is the rotation of the planet earth around its own axis.The earth rotates from the west towards East.One rotation completed in 23 h 56 min 4.9 seconds