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Let the total right answer is xand Total wrong answer = y Raj scored = 140 marks 3 x - y = 140 …………………(i) Raj scored = 170 marks 4 x - 2 y = 170 …………………(ii) Solving these equations, we get x = 55 So total correct answer = 55 Putting the value of x in eq(i) , we get y = 25 Total wrong answers = 25 so the total number of questions = 55 + 25 = 80Â
A man travels some distance at a speed of 20 km/hr and returns at a speed of 12 km/hr. If the total time taken by him is 2 hrs 40 min, the distance is ...
A boy goes to school at 8 km/Hr and return at a speed of 7 km/hr. If he takes 15 hrs in all. Find the distance from his village to school?
If 6 women can complete a work in 3 days, and 9 girls can complete the same work in 2 days, then find the time taken to complete the same work by 8 wome...
A cheetah can catch a deer running with a speed of 72 km/h and is 72 meters ahead of it, in 8 seconds. Find the time taken by the cheetah to catch a zeb...
Traveling from point 'I' to point 'J' takes 9 hours less at a speed of 72 km/h compared to traveling at 36 km/h. If 70% of the distance is traveled at 6...
‘A’ and ‘B’ started moving towards each other at same time with a speed of 22 km/hr and 33 km/hr, respectively. If the distance covered by ‘Aâ...
A boy goes to school at 8 km/Hr and return at a speed of 7 km/hr. If he takes 15 hrs in all. Find the distance from his village to school?
John cycles at 10 km/h to reach his destination at 2 PM. If he travels at 15 km/h, he will reach at 12 noon itself. At what speed should he travel to re...
Emily walks to the library at 4 km/h and returns at 2 km/h. The total time spent traveling is 9 hours. What is the distance from her home to the library?
