Suresh started his journey form P to Q by his bike at the speed of 40 km/h and then, the same distance he travelled on his foot at the speed of 10 km/h from Q to R. Then he returned from R to P via Q at the speed of 24 km/h. The average speed of the whole trip is:
ATQ, we can say that Let the distance between P and Q be 120 km. (LCM of 40, 10 and 24 = 120) PQ = QR = 120 km RP = 2 × 120 = 240 km Time taken by Suresh from point P to Q = Distance/Speed = 120/40 = 3 hours Time taken by Suresh from point Q to R = Distance/Speed = 120/10 = 12 hours Time taken by Suresh from point R to P = Distance/Speed = 240/24 = 10 hours ∴ Average Speed = (120 + 120 + 240) / (3 + 12 + 10) = 480/25 = 19.2 km/hr
Sum of the present ages of A, B, C and D is 70 years. After 5 years ratio of their ages is 5:4:3:3. What is C’s present age?
The sum of ages of organization members (including clerk and managers) is 380 years. The total ages of clerks and managers are in the ratio 1:3 and the ...
Determine the average current age of 'A' and 'B', given that six years ago, 'A' was 12 years younger than 'B', and twelve years from now, the ratio of t...
The ratio of age of ‘B’ after 2 years from now and age of ‘C’ 3 years ago from now is 7:4, respectively. The present age of ‘C’ is 40% of th...
The present ages of Grandmother and Grandfather are in 6:8 if the ratio of Grandmother age after 8 years and Grandfather age after 4 years becomes 5:7 t...
Determine the ratio of the present ages of Chintu to Danny if, 12 years ago, the ratio of Sunita's age to Binita's age was 9:5, and Sunita's age, 6 year...
The average age of the husband, wife and their child 4 years ago was 24 years and that of the husband and the child 5 years ago was 19 years. The prese...
At present Meena is eight times her daughter’s age. Eight years from now, the ratio of the ages of Meena and her daughter will be 9 : 2 respective...
The average age of 20 girls is 54 years. If the age of two more girls is added the average decreases by half a year. What is the sum of the age of new g...
A lad was asked his age by his friend. The lad said “The number you get when you subtract 25 times my age from twice the square of my age will be thri...