Question

A train travels 360 km in 4 hours. What is its speed in km/h?

• A. 80
• B. 90
• C. 100
• D. 120

Hint:

Use \( \text{Speed} = \frac{\text{Distance}}{\text{Time}} \) and verify by recalculating distance or time.

Answer 1

The Correct Option is B

We need the train’s spee(d)
- Step 1: Recall speed formul(a) Speed = \( \frac{\text{Distance}}{\text{Time}} \).
- Step 2: Assign values. Distance = 360 km, time = 4 hours.
- Step 3: Calculate spee(d)
\[ \text{Speed} = \frac{360}{4} = 90 \, \text{km/h} \] - Step 4: Verify. Distance = speed \(\times\) time: \( 90 \times 4 = 360 \). Correct.
- Step 5: Check options.
- (a) 80: \( 80 \times 4 = 320 \neq 360 \).
- (b) 90: Correct.
- (c) 100: \( 100 \times 4 = 400 \neq 360 \).
- (d) 120: \( 120 \times 4 = 480 \neq 360 \).
- Step 6: Alternative check. Time = \( \frac{360}{90} = 4 \). Matches given dat(a)
Thus, the answer is b.