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A car travelled 50 km at an average speed of 40 km/h. It then travels another 30 km/h at average speed before reaching its destination. average speed for whole journey is

Four Cars numbered as (C1, C2, C3 and C4) are participating in a car rally. They have to travel from P to Q then to R. After the race, the following is observed.(i) The digit in the car number and the

Four Cars numbered as (C1, C2, C3 and C4) are participating in a car rally. They have to travel from P to Q then to R. After the race, the following is observed.(i) The digit in the car number and the

Four Cars numbered as (C1, C2, C3 and C4) are participating in a car rally. They have to travel from P to Q then to R. After the race, the following is observed.(i) The digit in the car number and the

When a local train travels at a speed of 60kmph, it reaches the destination on time. When the same train travels at speed of 50kmph, it reaches its destination 15mnts late. What is the length of journ

The speed of a bus during the second hour of its journey is twice that in the first hour. Also, its speed during the third hour is two-third the sum of its speeds in the first two hours. Had the bus t

Rajesh travelled from city A to city B covering as much distance in the second part as he did in the first part of this journey. His speed during the second part was twice as that of the speed during