Question
A train crosses a platform 100 m long in 60 s at a speed
of 45 km/h. The time taken by the train to cross an electric pole isSolution
Let the length of the train be D,
Then, S = D/T
45 x (5/18) = (D + 100)/60
D = 650 m
Now, when trains crosses the electric pole
45 x (5/18) = 650/T
T = 52 sec
A father is three times as old as his son. Four years ago, he was five times as old as his son. What are their present ages?
Palash invest thrice the sum invested by Vicky and withdraws half of the sum after 3 months and again withdraws half of the remaining sum after 3 months...
A shopkeeper marks a product at 20% above the cost price. He then offers a discount of 15% on the marked price. If he still makes a profit of ₹200, wh...
What is the total number of work hours reported by employees in the Sales department?
Compute P(AǀB), if P(B) = 1.0 and P(A∩B) = 0.64
The condition for the line y = mx + c to be tangent to the circle  x ²  + y ²  = r ² isÂ
A train that is 300 meters long takes 15 seconds to pass a tree. What is the speed of the train in kilometers per hour?
Two supplementary angles add up to 180°. If one angle is 115°, what is the other angle?
Determine the area of the largest circle that can be inscribed inside a square with a side length of 28 cm? (Use π = 22/7)
