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.

Question: A businessman earns $28800 in December, thus decreasing his average annual (January to December) earnings by $1300. His average annual earnings would be
Source: CMAT Preparation

Option A: $29000

Option B: $33500

Option C: $40200

Option D: $41000

Option E: $43100
Option E

Question: How much time will it take for an amount of Rs. 900 to yield Rs. 81 as interest at 4.5% per annum of simple interest?

Option A: 2 years

Option B: 3 years

Option C: 1 year

Option D: 4 years

Option E: 5 years
Option A

Question: Two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is?

Option A: 18 sec

Option B: 17 sec

Option C: 48 sec

Option D: 19 sec

Option E: 12 sec
Option C