TASK DEFINITION: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
PROBLEM: Question: The average salary per head of the entire staff of an office including the officers and clerks is Rs.90. The average salary of officers is Rs.500 and that of the clerks is Rs.84. If the number of officers is 2, find the number of officers in the office?

Option A: 620

Option B: 720

Option C: 820

Option D: 920

Option E: 1020

SOLUTION: Option C

PROBLEM: Question: Car X began traveling at an average speed of 35 miles per hour. After 72 minutes, car Y began traveling at an average speed of 41 miles per hour. When both cars had traveled the same distance, both cars stopped. How many miles did car X travel from the time car Y began traveling until both cars stopped?

Option A: 140

Option B: 175

Option C: 210

Option D: 245

Option E: 280

SOLUTION: Option D

PROBLEM: Question: The length of the bridge, which a train 140 metres long and travelling at 45 km/hr can cross in 30 seconds, is?

Option A: 10 m

Option B: 16 m

Option C: 245 m

Option D: 19 m

Option E: 235 m

SOLUTION:
Option E