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.

Q: Problem: the area of a triangle is with base 18 m and height 6 m ?
Options: a. 88 m 2, b. 10 m 2, c. 66 m 2, d. 54 m 2, e. 31 m 2

A: d
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Q: Problem: a man goes to shopkeeper and says that if u give me as much as i have, i will spend rs. 10 / - on ur shop. shopkeeper agrees and man moves to another shopkeeper ans asked same. at 3 rd shop after all the transaction, he was left with no money. find the initial amount with the man
Options: a. 5.75, b. 6.75, c. 7.75, d. 8.75, e. 9.75

A: d
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Q: Problem: if the simple interest on a sum of money for 2 years at 5 % per annum is rs. 50, what is the compound interest on the same sum at the rate and for the same time ?
Options: a. rs. 51.25, b. rs. 51.27, c. rs. 51.79, d. rs. 51.8, e. rs. 51.93

A:
a
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