instruction:
Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
question:
Problem: the cross - section of a cannel is a trapezium in shape. if the cannel is 12 m wide at the top and 2 m wide at the bottom and the area of cross - section is 4200 sq m, the depth of cannel is ?
Options: a. 500, b. 600, c. 700, d. 800, e. 900
answer:
b


question:
Problem: a man goes downstream at 10 kmph, and upstream 8 kmph. the speed of the stream is
Options: a. 0 kmph, b. 4 kmph, c. 1 kmph, d. 2.5 kmph, e. 26 kmph
answer:
c


question:
Problem: a starts business with rs. 3500 and after 8 months, b joins with a as his partner. after a year, the profit is divided in the ratio 2: 3. what is b â € ™ s contribution in the capital ?
Options: a. 24887, b. 20778, c. 23788, d. 15750, e. 2811
answer:

d