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Let slant height of the cone be ‘l’ cm
So, (22/7) × 18 × l = 1980
Or, l = 35 cm
So, height of the cone (h) = √{35² – 18²} = 30 cm
In an election, a voter may vote for any number of candidates not greater than the number to be chosen. There are 8 candidates and 5 members are to be c...
There are two types of animals in a pet shop. Some are puppies and some are kittens. Each kitten takes 8 biscuits and each puppy takes 11 biscuits. If 5...
A group consists of 9 boys and 7 girls. In how many ways can 4 boys and 3 girls be selected from the group?
How many three-letter words can be formed such that all letters are vowels, and no two letters are the same?
How many five digit numbers can be formed using the digits 0, 1, 2, 3, 4 and 5 which are divisible by 5, without repeating the digits?
In how many different ways can the letters of the word "AIRSTRIKE" be arranged if all the vowels must always be grouped together?
8 students appear in an examination. In how many ways can the result be announced?
Four dice are rolled simultaneously. What is the number of possible outcomes in which at least one of the die shows 2?
A letter is randomly selected from the word "DETACHMENT." What is the probability that the selected letter is a vowel?
In how ways can the selection be made so that a particular member is always included?
