Question

The sum of three numbers in an arithmetic progression is 270. If the first number is 45, what is the product of first and the last numbers?

4500
9000
4050
6075

Answer 1

Answer:

6075

Step-by-step explanation:

Let the three numbers in arithmetic progression be a-d, a and a+d respectively.

Sum of three numbers in arithmetic progression is 270.

Hence, a-d+a+a+d = 270

3a = 270; a=90

Given the first number is 45 which means a-d is 45. This implies d is 45.

Therefore, the numbers are 45, 90 and 135

The product of first and the last numbers is 45×135 i.e 6075

Answer 2

Answer:

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Step-by-step explanation:

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