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Let the efficiency of Suman be '1e' unit/day Efficiency of Aman = 2 X 1e = '2e' units/day Total work = (1e + 2e) X 12 + 4 X 1e = 36e + 4e = 40e units Therefore, required time = (40e/2e) = 20 days
A car covers its journey at the speed of 80 km/hr in 10 hours. If the same distance is to be covered in 4 hours, by how much the speed of the car will h...
A car travels from village A to village B at a speed 20% faster than its usual speed and arrives 30 minutes early. If the distance between A and B is 16...
A Bus moving at a speed of 's' km/h can pass a stationary person in 16 seconds and a tunnel Bridge that is 240 meters long in 28 seconds. Determine the ...
Ajay and Vishal left the place ‘X’ with different speeds which are in the ratio 7:6 respectively. Ajay left the place 36 seconds after Vishal. If af...
Ravi travels the first 40% of a certain distance at a speed of 20 km/h, the next 30% at 10 km/h, and covers the remaining 30% at 12 km/h. Calculate Ravi...
Pawan Express is a 300-meter-long train which moves at an average speed of 100 km/hr and crosses a platform in 27 seconds. A man crosses the same platfo...
A train covers a distance of 80 km at the speed of 55 km/h the next 50 km distance covers with a speed of 40 km/h and last 60 km with the speed of 80 km...
A train, measuring 450 meters in length and traveling at a speed of 35 meters per second, takes 20 seconds to pass a platform. If another train, travel...
The speed of ‘A’ and ‘B’ is 65 km/hr and 40 km/hr, respectively. If the distance covered by ‘A’ in ‘x&r...
In a 2000-metre race, 'Aarav' beats 'Dev' by '400' metres and 'Ishaan' by '600' metres. If 'Dev' and 'Ishaan' participate in an 800-metre race, and 'Ish...
