Question
Average speed of ‘A’ during a 20-hour journey is 24
km/h. If he covered the first 320 km of his journey at a speed of 20 km/h, then find the speed at which ‘A’ travelled during the remaining journey.Solution
Total distance covered by ‘A’ = 20 × 24 = 480 km Time taken to cover 320 km = 320/20 = 16 hours Time taken to cover remaining distance = 20 – 16 = 4 hours So, required speed = {(480 – 320)/4} = 40 km/h
A person spent 30% of his monthly income on food and 60% of the remaining on rent. If amount spent on rent is Rs 840, then find the amount spent ...
Number p is 15% more than 150. If k is 15% less than p, then k is equal to:
Out of her total income, Meena spent 15% on groceries, 25% on food and 10% on transport. If she spent 30% of the remaining on entertainment and saved th...
- Initially, Rina’s salary was Rs. 40,000 and the ratio of her expenditure to her savings was 3:5. After a salary increase, she reduced her expenditure by ...
Income of A is 52% of the Income of B and A together. The saving of B is 30% of his Income and equals to Rs. 8100. Find the difference between the incom...
Out of 840 students in a college, the proportion of boys to girls is 3:4. In the midterm exam, 15% of boys and 10% of girls failed. How many students fa...
If the student scores 25% marks then he is failed by 150 marks. But if he scores 55% marks then he is passed with 180 marks. Find the passing percentage?
An army lost 20% its men in war, 20% of the remaining due to diseases and 20% of the rest were disabled. Thus, the strength was reduced to 64,000 active...
A sum of money invested at simple interest amounts to Rs. 16800 in 2 years and to Rs. 23100 in 9 years. What is the rate of simple interest per annum?
The marks scored by a boy in three subjects are in the ratio 2 : 3 : 4. Boy scored an overall aggregate of 75% in the exam. If the maximum marks in each...
