instruction:
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:
Question: The cross-section of a cannel is a trapezium in shape. If the cannel is 16 m wide at the top and 4 m wide at the bottom and the area of cross-section is 700 sq m, the depth of cannel is?

 Option A: 76

 Option B: 28

 Option C: 27

 Option D: 80

 Option E: 70
answer:
Option E


question:
Question: a light flashes every 30 seconds, how many times will it flash in ? of an hour?

 Option A: 550

 Option B: 600

 Option C: 650

 Option D: 700

 Option E: 120
answer:
Option E


question:
Question: A man can row upstream at 8kmph and downstream at 13 kmph. The speed of the stream is?

 Option A: 3kmph

 Option B: 2.5kmph

 Option C: 3.5kmph

 Option D: 4.3kmph

 Option E: 5kmph
answer:

Option B