Ben spent triple the amount of time on the homework as David. David spent 3 times more than Sandro. Which equation represents the relationship between the amount of time Ben and Sandro spent on their homework?

Answer Choices:

A: B=9s

B: B=3+3S

C: S=6B

D: B=3+S

The correct answer is option A: B=9s

Step-by-step explanation:

Let the time taken to do the homework by David be = D

Let the time taken to do the homework by Ben be = B

Let the time taken to do the homework by Sandro be = S

As Ben spent triple the amount of time on the homework as David so

B = 3D ... (1)

Also given is, David spent 3 times more than Sandro. So, D = 3S ... (2)

Putting the value of D in equation (1)

B = 3 (3S)

Hence, B = 9S