MALU EARNS rs5 MORE IN A WEEK THAN IN PRECEEDING WEEK.HE EARNED rs135 IN FIRST WEEK.HOW MUCH WILL HE EARN AT THE END OF 39th WEEK??
135 + 38*5
nooo
8970 is the answer...but i dont know how???
oops. My answer was the amount earned in the 39th week. To find how much he has earned during the whole 39 weeks, use the sum formula:
S39 = 39/2 (2*135 + 38*5) = 8970
thank u
To find out how much Malu will earn at the end of the 39th week, we first need to determine the pattern of his earnings.
We know that Malu earns Rs5 more in a week than in the preceding week. Therefore, we can deduce that each week's earnings can be calculated using the formula:
Earnings of the current week = Earnings of the previous week + Rs5
Now let's calculate Malu's earnings week by week:
Week 1: Malu earns Rs135
Week 2: Earnings of the previous week + Rs5 = Rs135 + Rs5 = Rs140
Week 3: Earnings of the previous week + Rs5 = Rs140 + Rs5 = Rs145
We can observe that the pattern continues, with each week's earnings increasing by Rs5. Therefore, we can calculate Malu's earnings for the 39th week using the following formula:
Earnings of the 39th week = Earnings of the first week + (39 - 1) * Rs5
Let's calculate it:
Earnings of the 39th week = Rs135 + (39 - 1) * Rs5
= Rs135 + 38 * Rs5
= Rs135 + Rs190
= Rs325
Thus, Malu will earn Rs325 at the end of the 39th week.