Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
48 views
in Aptitude by (115k points)
closed by

A train 130 m long crosses a 110 m long bridge in 7.5 seconds. What is the speed of the train in km/h?


1. 115.2 km/h
2. 110.5 km/h
3. 120 km/h
4. 125 km/h

1 Answer

0 votes
by (114k points)
selected by
 
Best answer
Correct Answer - Option 1 : 115.2 km/h

Given:

Length of train = 130 m

Length of bridge = 110 m

Time taken to cross to bridge = 7.5 seconds

Concept:

The length calculated to cross the bridge is the length of the train and the bridge added together.

Formula used:

Speed = Distance/Time

Conversion from m/s to km/h = Multiply with 18/5

Calculation:

The total distance travelled by the train = 130 m + 110 m

⇒ 240 m

Speed of the train while crossing the bridge = 240/7.5 m/s

⇒ 32 m/s

Speed of the train in km/h = {32 × (18/5)} km/h

⇒ 115.2 km/h

∴ The speed of the train is 115.2 km/h.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...