Question
A boat travelled for the first 90 km at a certain speed
in 3 hours. After that, the speed of the boat decreased by 2 km/h. If the boat took a total of 5 hours to reach its destination, then find the total distance travelled by the boat.Solution
ATQ, Speed of the boat by which it travelled 90 km = 90/3 =30 km/h Time taken to cover the remaining distance = 5 - 3 = 2 hours Decreased speed of the boat = 30 - 2 = 28 km/h Distance travelled with decreased speed = 28 × 2 = 56 km Therefore, required distance = 90 + 56 = 146 km
A shopkeeper marks the price of an article 40% above its cost price. During a sale, he offers a discount of 25% on the marked price. What is his overall...
Raman spends 15% of his income on house rent, 20% of the remaining on food, 25% of the now remaining on education, (3/17)th of the now remaining on trav...
The amount (in Rs) received at 10% per annum compound interest after 3 yrs is Rs 1,19,790. What was the principal?
A man spent 38% of his income in May. If his savings is increased by 20% in June and becomes Rs. 14880, then find the income of man in May.
The salary of a man increased from Rs. 16000 per month to Rs. 18000 per month. Find the increase percent.
Ajay spent 34% of his monthly income on rent and 48% of the remaining on food and the rest amount is saved by him which is Rs. 2574, then find the month...
The marks scored by a boy in three subjects are in the ratio 2 : 3 : 5. Boy scored an overall aggregate of 60% in the exam. If the maximum marks in each...
M scored 30% marks in an exam whereas N scored 270 marks in the same exam. If the score of N is 90 marks more than that of M, then find the maximum mark...
Find the value of x if, 25% of 80 = 225 – x% of 440.
Total number of students in a class is 1920, and the ratio of number of boys to girls is 7:9. If the number of boys and girls is increased by a% and (a ...
Relevant for Exams:
