Question
The speed of current is 12 km/hr. If the speed of the
boat in still water had been 15 km/hr more than the original speed, then it would take 9 hours to cover 567 km in downstream. Find the original speed of the boat in still water (in km/hr).Solution
ATQ, Let the speed of the boat in still water be ‘x’ km/hr. According to the question, (x + 15 + 12) = 567 / 9 Or, x + 27 = 63 So, x = 63 - 27 = 36 km/hr
In a garden, the ratio of roses to tulips is 2:3. After planting 6 additional roses and 4 additional tulips, the ratio of roses to tulips changes to 3:4...
If 75% of (P - Q) equals 25% of 60% of (P + Q), what is the ratio of Q to P?
Two boxes have chocolates in the ratio 7:5. If the difference in the number of chocolates is 28, find the number of chocolates in the box with larger nu...
The average mark obtained by 150 candidates in a certain examination is 45. If the average marks of passed candidates are 55 and that of the failed cand...
A certain amount was divided among four people P, Q, R and S such that the amount obtained by S is 12.5% more than the amount obtained by Q. The amount ...
In a chemistry lab two beakers A and B contains 36% and 40% of spirit respectively. If two liters from A is mixed with 4 liters of B. The ratio of spiri...
The ratio of number of girls to number of boys is 3 : 2 in a class of 60 students. The average marks scored by the boys in Physics is 72 and the average...
If the ratio of income of Aman and Rahul is 5:4 and the ratio of their expenses is 3:2 and each saved Rs 1600 then find the income of Aman.
A bag contains 10-paisa, 20-paisa and 50-paisa coins in the ratio of 8:9:10, respectively. If the total amount in the bag is Rs. 38, then find 80% of th...
- Find the mean proportion between 36 and 100.
Relevant for Exams:
