Question

an interest of 28.50 rupees was earned on a certain sum of money after 9 months when the rate on interest was 15% .had the rate been 15/2% p.a. what would be the interest in rupees​

Answer 1

Step-by-step explanation:

Given :-

Time taken by the boat = 8 min 15 sec

Number of crossings in a day = 15 crossings

To Find :-

For how long did it travel throughout the day.

Analysis :-

Firstly find the time taken in one travel by substituting the given values from the question using it's respective formula.

In order to find for how long did it travel throughout the day multiply time taken in one travel and number of crossing.

Solution :-

We know that,

t = Time

d = Distance

s = Speed

Using the formula,

$\underline{\boxed{\sf Time \ taken \ in \ each \ travel=Time \times Crossing}}$

Given that,

Time (t) = 8 min 15 sec = 495 sec

Crossing = 15

Substituting their values,

⇒ 495 × 15

⇒ 7425 sec

According to the question,

$\underline{\boxed{\sf Time \ travelled \ each \ day=Total \ time \times Crossing }}$

Given that,

Time (t) = 7425 sec

Crossing = 15

Substituting their values,

⇒ 7425 × 15

⇒ 111375 sec = 123 min 45 sec

⇒ 2 hour, 3 min, 45 sec

Therefore, the boat travels 2 hour, 3 min, 45 sec throughout the day.

Answer 2

Step-by-step explanation:

interest was ... rate been 15/2% p.a. what would be the interest in rupees.