Question
Before servicing, a car runs at a speed of 20 km/hr
while after servicing, it runs at a speed of 30 km/h. After servicing the car covers a certain distance in 8 hours. How much time would the car have taken to cover the same distance when it was not serviced?Solution
After servicing, Distance covered by the car = 30 × 8 = 240 km Required time taken = 240/20 = 12 hours
How many ways can 8 women and 8 men be seated around a circular table where no two women can sit together?
Five articles out of which 3 are cups and rest are glasses have to be arranged on a shelf. Find the number of ways of arrangement in which all three cup...
In how many different ways can the letters of the word ‘PADDLED’ be arranged?
An examinee is required to answer the eight questions out of 16 questions which are divided into two groups each containing eight questions each and he...
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...
Find the quantity of methods of picking 4 cards from a set of 52 playing cards if four cards are of the same unit?
...
A man has 15 friends out of which 7 are his relatives. In how many ways can he invite his 9 friends in which at least 5 must be his relatives?
A group of 5 students is to be selected from 6 boys and 5 girls. Find the number of ways to form team such that the team consists of at most 2 boys.
Geography books are always together.
In how many different ways can the letters of the word QUANTITY be arranged so that the vowels always come together?
Relevant for Exams:
