Answer:
C THE ANSWER IS C
Step-by-step explanation:
Answer:
12
Step-by-step explanation:
based on pythagorean triples 5, 12, 13 and 8, 15, 17.
The answer is 34.3 minutes
EXPLANATION
To round off to the nearest tenths, you need to find first the tenths value. In this case, it's 2.
Next, look to the number on the right side or the hundredths value. Since 8 is greater than 5, you have to round the tenths value up.
From 2, you'll now have 3. Zero out the values on the right of the tenths value.
So basically, you'll have now 34.3 minutes
<h2><u>Solution</u> :-</h2>
Let the usual speed of bus be x km/hr.
Time = Distance / Speed = 300/x hrs
According to the question,
=> (300/x - 2) (x + 5) = 300
=> (300 - 2x)/x (x + 5) = 300
=> 300x + 1500 - 2x² - 10x = 300x
=> 2x² + 10x - 1500 = 0
=> 2(x² + 5x - 750) = 0
=> x² + 30x - 25x - 750 = 0
=> x(x + 30) - 25(x + 30) = 0
=> (x - 25) (x + 30) = 0
=> x = 25 or x = - 30
∴ x ≠ - 30 (Because speed can't be negative)
<u>Hence</u>,
The usual speed of bus = 25 km/hr
