Mathematics
A solid is in the shape of a hemisphere of radius 7 cm, surmounted by a cone of height 4 cm. The solid is immersed completely in a cylindrical container filled with water to a certain height so that the solid is completely submerged in water. If the radius of the cylinder is 14 cm, find the rise in the water level.
Related Questions
A bag contains 25 cards, numbered through 1 to 25. A card is drawn at random. What is the probability that the number on the card drawn is :
(a) a multiple of 5
(b) a perfect square
(c) a prime number ?
A man covers a distance of 100 km, travelling with a uniform speed of x km/hr. Had the speed been 5 km/hr more it would have taken 1 hour less. Find x the original speed.
The following table gives the marks scored by a set of students in an examination. Calculate the mean of the distribution by using the short cut method.
Marks Number of students (f) 0-10 3 10-20 8 20-30 14 30-40 9 40-50 4 50-60 2 What number must be added to each of the number 4, 6, 8, 11 in order to make them proportional ?