Question

Spiderman has $350 in his account and his earnings $25 per day. Batman has $200 in his account and earns $35 per day. After how many days, d, will Spiderman have more than Batman?

Answer 1

16 days

Explanation:

The computation of the number of days will spiderman have greater than Batman which is to be shown below

Here it is given that

350 + 25x < 200+35x

Now solve it

That comes

150 < 10 x

15 < x

So here we choose 16 days as in 16 days the spiderman has the more than the batman and the same is to be considered

Answer 2

Given :

Spider man has $350 in his account and his earnings $25 per day.

Batman has $200 in his account and earns $35 per day.

To Find :

After how many days, d, will Batman have more than Spider man .

Solution :

Let , after x days they both have same amount .

`350+25x=200+35x\\\\10x=150\\\\x=15`

So , at 15th day they both have equal amount .

Therefore , after 15 days i.e in 16th day batman have more money than spider man .

Hence , this is the required solution .