Question
Side of a square is 20% less than the length of a
rectangle. The area and width of the rectangle are 2520 cm² and 36 cm. What will be the perimeter of the square?Solution
ATQ,
Length of rectangle = (2520 / 36) = 70 cm
Side of square = 0.8 × 70 = 56 cm
Required perimeter = 4 × 56 = 224 cm
A person is walking at 4 m/sec in the same direction of a train. The train crosses him in 5 seconds. If train speed is 72 km/hr, find the time it takes ...
Train ‘A’ travelling with a speed of 84 km/h can cross a pole in 12 seconds. If the length of train ‘B’ is 20% less than that of train ‘A’ a...
Train A, moving at 90 km/h, crosses a pole in 8 seconds. Find the time it takes to cross another train of equal length, coming from the opposite directi...
Time is taken by two trains running in opposite directions to cross a man standing on the platform in 30 seconds and 20 seconds respectively. It took 24...
A person is walking at 4 m/sec in the same direction of a train. The train crosses him in 7 seconds. If train speed is 72 km/hr, find the time to cross ...
Train ‘X’ is 360 metres long and takes 18 seconds to pass a standing man. Speed of train ‘Y’ is 25 m/sec. If both trains are moving towards each...
A train 500 m long running at 90 km/hr takes 40 seconds to cross a bridge. The length of the bridge is
Train A and train B cross a pole in 8 sec and 9 sec respectively. Train A can cross a platform in 18 sec and train B can cross the same platform in 24 s...
A train 500 m long running at 108 km/hr takes 40 seconds to cross a bridge. The length of the bridge is
- A 220 metres long train, travelling at 60 km/h crosses a platform in 30 seconds. What is the length of the platform?
Relevant for Exams:
