Question
A train with 8 compartments of equal length takes 18
seconds to cross a pole and 24 seconds to cross a 150-metre-long platform. If 4 compartments of the train are removed, then how long would it take to cross a pole?Solution
Let the original length of the train = ‘d’ metres
Then, distance covered by the train in 18 seconds = ‘d’ metres
Distance covered by the train in 24 seconds = (d + 150) metres
So, distance covered in (24 – 18) = 6 seconds = (d + 150 – d) = 150 metres
So, speed of the train = 150 ÷ 6 = 25 m/s
So, original length of the train = 25 × 18 = 450 metres
After removing 4 compartments, length of the train = 450 × (4/8) = 225 metres
So, required time taken = 225 ÷ 25 = 9 seconds
Which seed treatment method involves dry seeds being placed in containers and covered with concentrated Sulphuric acid (H2SO4) or HCl in the ratio of on...
Which among the following is considered a primary pollutant directly emitted into the atmosphere?
Slate is metamorphosed:
Which pathogen is responsible for causing Tea Rust disease?
Glutathione -S-transferase is responsible for the selectively of
If grain and straw yields are 4 and 6 t/ha, respectively, the harvest index will be
______ induces lateral cell expansion
Which of the following groups is of pre-emergence herbicides?
What is the maturity indicator in groundnut, which is used to decide a perfect stage of harvesting ?
The coriander flower is:
Relevant for Exams:
