Question
Train A running at a speed of 30 km/hr crosses train B
in 20 seconds. Find the speed of train B (in km/hr), if the sum of the length of train A and B is 350 meters and both trains running in the opposite direction.Solution
Let speed of train B be ‘x’ km/hr. According to question, => 20(30 + x) × (5/18) = 350 => 600 + 20x = 1260 => 20x = 660 => x = 33 km/hr
Amit can complete a task alone in 20 days. Bheema and Chetna, working together, can complete the same task in 12 days. The ratio ...
A shopkeeper sells the Pen at the discount of 30% on its marked price while he gets the profit of 40% on cost price of the pen. A pen marked at Rs.18 is...
A closed cylindrical tank has a radius of 7 m and a height of 15 m. Calculate the total surface area of the tank (use π = 22/7).
If cos θ = 3/5, find the value of sin 2θ:
Pipe X can fill a tank on its own in 12 hours, while Pipe Y can fill the same tank individually in 20 hours. Both pipes X and Y o...
The income of ‘A’ increases by 25% every year. If the present income of ‘A’ is Rs. 28125 and his expenditure 2 years ago from now was Rs. 12000,...
The equation of the circle passing through points A(1,0), B(0,6), and C(4,2) is
The monthly incomes of A and B are in the ratio of 5:6. A's monthly savings are 50% higher than B's monthly savings, while A's monthly expenditure equal...
"Arjun" can complete a task on his own in 20 days. "Bhuvan" requires 5 days more than "Chirag" to finish the same task, where "Ch...
In a cyclic quadrilateral ABCD, angle A = 70 degrees and angle B = 100 degrees. What is the measure of angle C?
Relevant for Exams:
