Question
A Policeman spotted a thief 30 meters ahead of him. The
moment they both saw each other they started running in the same direction on the same track. The thief was running at 9m/sec and the policeman was chasing him at the speed of 12 m/sec. How much distance the policeman needs to cover to catch the thief.? ÂSolution
Relative speed = 12 m/sec - 9 m/sec = 3 m/sec  Time to close the gap = 30 meter /3 m/sec = 10 seconds Distance covered by the policeman: 12 m/sec × 10 seconds = 120 meters The distance the policeman needs to cover = 120 meters.
The university has 750 faculty (male and female only) out of which the females are 60%. The average height of females is 162 cm and that of males is 168...
In an examination the average marks of Rohit is 60. If he got 19 more marks in science and 26 more marks in maths then his average would have been 65. F...
The average weight of a class of 25 student is 60 KG. If X is student joined the class, than the average weight of whole class increases by (2X – 7)...
The average salary of 6 workers is (x + 5). If the average salary of the first three workers is ₹10,000 and that of the last three workers is ₹14,00...
The average of three numbers is 24. If the sum of the first two numbers is 46, find the third number
Anil bought 27 notebooks for Rs.1280 from shop A and 20 notebooks for Rs.1211 from shop B. What is the average price he paid per book?
The average weight of 40 students in a class is 50 kg. If two new students with weights 72 kg and 68 kg join the class, find the new average weight of t...
Average age of company A is 28 years and average age of both companies A and B is 20 years. If the ratio of number of employees in company A and B is 3:...
Average weight of 36 students is 68 kg. When two new students with weights (m + 12) kg and (m - 6) kg join, the average weight becomes 69 kg. Find the v...
The average of 13 numbers is 10.The average of first 6 numbers is 8 and that of the last 6 numbers is 10. What will be the 13th number?
Relevant for Exams:
