Question

A boy spends₹15 in the first week,₹45 in second week,₹135 in the third week. Find how much in all will he spend at end of 8 weeks

Answer 1

For 1st week he spent = 15

2nd week he spent = 15 x 3 = 45

3rd week = 45 x 3 = 135

4th week = 135 x 3 = 405

5th week = 405 x 3 = 1215

6th week = 1215 x 3 = 3645

7th week = 3645 x 3 = 10935

8th week = 10935 x 3 = 32805

Total = 32805 + 10935 + 3645 + 1215 + 405 + 135 + 45 + 15 = 49200

Answer 2

he will spend 49200 at the end of eight year