Question
A car accelerates from rest at a uniform rate of 2 m/s²
for 10 s. What is the total distance traveled?Solution
Using the kinematic equation: s= ut + 1/2 at2 Since u=0. a=2 and t=10- S= 1/2 x 2 x (10)2 =100 m
- The average speed of a car over the first 4 hours is 50 km/h. If the car needs to maintain an average speed of 60 km/h over a total of 8 hours, what should...
Average of 20 numbers is 90. Average of first 8 numbers is 125 while average of last nine numbers is 40. If ninth number is 25% less than the tenth numb...
In a school, the average number of books that some numbers of boys have is 80 and average number of books that some numbers of girls have is 50. If each...
The average marks of 22 students is 64. If x new students join with an average of 75 marks, the class average increases to 66. Find x.
Average run scored by a batsman in first ‘x’ matches is 20. In next 5 matches he scored runs with an average of 60 so that his overall average incre...
The overall average score of a group of students is 70. The boys have an average of 60 and the girls average 85. By what percentage is the number of boy...
The total number of teachers in Department A and Department B together is 112. The number of teachers in Department A is 80% more...
Average age of a class of 25 students is 13 years. Average age of the class is increased by 30 months if the age of the teacher is included. Find the ag...
The average weight of 16 people increases by 500 grams when two individuals, each with an average weight of 40 kg, are added. What is the new average we...
In a factory of 40 labours, if the two labours left the job whose wages were Rs. 950 and Rs. 1050 and two new labours join the factory which results in ...