For the following questions answer them individually
If the midvalue of a class is 20 and the width of the class is 5, find the lower and upper limits of the class.
What is the definite path on which the planet revolves around the Sun, called as?
Choose from the alternatives the figure that best completes the pattern given below.
The male and female sex cells fuse to form a?
Dialysis is used when a patient has serious trouble with?
The medium required for transmission of sound should be in ______ state.
The angle of elevation of the top of a chimney from the top of a tower is $$60^\circ$$ and the angle of depression of foot of the chimney from the top of the tower is $$30^\circ$$ . If the height of the tower is 40 m, then find the height of the chimney.
Simplify:$$10 \times 4 - 2 \times (4^{2} \div4 ) \div 2 (\frac{1}{2})$$ + 9
Which of the following statements is TRUE about acids?