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Let the radius of two cones r1 and r2. Volume of cones = 1/3× πr2h The volume of two cones = volume of a sphere 1/3× πr12 h +1/3× πr22 h = (4/3) π ×r3 π/3×9h +π/3×16h = 4π/3 ×125 π/3[9h+16h] =4π/3 ×125 25h = 4×125 h=20cm
In how many ways can 17 members be seated in two lines with seating capacity of 9 and 8 members respectively?
1. 9! ×8!
2. �...
In how ways can the selection be made so that a particular member is always excluded?
How many words can be formed with the letter of the word ‘NUMBER’ when alll vowels are never together?
History books are always together and also Geography books are always together?
7 children are to be selected from a group of 8 boys and 6 girls. In how many ways will the children with at most 3 girls and at least 4 boys be selected?
In how many ways a Cricketer can make a Double century with fours and Sixes only?
Find the number of words formed by using all the letter of the word MEMBER, so that the vowels are always together.
...How many different nine digit numbers can be formed from the number 66 55 99 222 by rearranging its digits so that the odd digits occupy even positions...
A total of 24 points are given on a plane, out of which 10 are collinear. How many distinct straight lines can be formed using these points?
Find the quantity of methods of picking 4 cards from a set of 52 playing cards if four cards are of the same unit?
