Question
Two trains of lengths 100 m and 90 m are running with
speeds of 60 km/hr and 57 km/hr respectively towards each other on parallel lines. If they are 70 m apart, after how many seconds they will cross each other?Solution
Relative speed = (60 + 57) km/hr. = 117 km/hr. => 117 × (5/18) m/sec = 65/2 m/sec Distance covered = 100 + 90 + 70 = 260 m Required time = 260 × (2/65) = 8 sec
In a school a total of 8,640 apples was distributed among all the students in the school. The apples were distributed in such a way that number of apple...
A tree increases annually by one - fourth of its height. What will be the height of the tree after 3 years, if it stands today at 64 cm height?
Three pairwise co-prime natural numbers have the following property: The product of the first and second numbers is 210, and the ...
Sum of squares of three consecutive numbers is 974. Find the sum of first and third number.
- The cost of item A is 8 more than the sum of cost of B and C together. The ratio of cost of item B and C is 3:5 respectively. The cost of B is a multiple o...
If '502x62y' is a seven-digit number which is divisible by 72, then find the least possible value of (x - y).
240 students need to be arranged to sit in 12 rows. If the number of rows increases by 25%, then find the number of students who will now be sitting in ...
A waiter income consist of his salary and tips. During one week his tips were 4/5 of his salary. What portion of his income came from tips?
Find the unit digit of the product 127 × 137 × 413 × 291 × 342 × 533 × 342.
Raj scored 140 marks in a test getting 3 marks for each right answer and losing 1 mark for each wrong answer, had 4 marks been awarded for each correct...
Relevant for Exams:
