Question
The base of a triangle is 18 cm and height is 15 cm. The
height of another triangle of double the area having the base 27 cm is:Solution
Using the formula, Area of the triangle = 1/2 x base x height ⇒ 1/2 x 18 x 15 = 135 cm2 According to the question Area of the another (second) triangle = 2 × 135 = 270 cm2 Area of the new triangle =1/2 x base x height 270 = 1/2 x 27 x height Therefore, height = (270 x 2)/27 = 20 cm
The resistance of a wire is 10 Ω. What will be its resistance if its length is tripled? (Assume uniform cross-sectional area)
Which of the following statement is correct?
I. The incident ray, the normal at the point of incidence and the reflected ray all lie in the sa...
Specific resistance of a conductor increases with :
Sound travels fastest in which medium? Â
A rubber ball is dropped from a height of 2 metres. To what height will it rise if there is no loss of energy/velocity after rebounding?
A particle dropped from the top of a tower uniformly falls on ground at a distance which is equal to the height of tower. Which of the following paths ...
A particle moving in a straight line with uniform acceleration covers distances 5 m, 9 m, and 13 m in the 1st, 2nd, and 3rd second of motion respectivel...
For a projectile, maximum range is obtained when angle of projection is:
A soap bubble shows colours when illuminated with white light. This is due to –
Two capacitors of 4 μF and 6 μF are connected in series. The equivalent capacitance is:
