Explanation

To find the duration of the train journey, subtract the start time from the arrival time:

Arrival time: 5:23 p.m.

Start time: 9:32 a.m.

Convert both times to a 24-hour clock:

Arrival time: 17:23 (5:23 p.m.)

Start time: 09:32 (9:32 a.m.)

Subtract the start time from the arrival time:

17:23 - 09:32 = 7 hours 51 minutes

Therefore, the train journey took 7 hours and 51 minutes.

Explanation

Explanation

both 3 and 13 reach their destination at the same time after 3 minutes

hence the time taken is 7+10+3=20 minutes.

Explanation

10 machines * 5 days = 50 machine-days.

50 machine-days / 5 machines = 10 days

Explanation

To find the range (d) of a TV transmitter antenna, we use the line-of-sight formula:

d ≈ √(2 × h × R)  

Where:  

- d = distance to the horizon in kilometers  

- h = height of the antenna in kilometers  

- R = radius of Earth ≈ 6371 km  

Convert height:  

h = 100 m = 0.1 km  

Now plug in:  

d ≈ √(2 × 0.1 × 6371) ≈ √1274.2 ≈ 35.7 km  

So, the range is approximately 36 km

Explanation

To calculate average speed, use the formula:

Average Speed=Total Distance/Total Time​

Given:

• Total Distance = 60 km

• Total Time = 2 hours

Now, substitute these values into the formula:

$$text{Average Speed} = frac{60}{2} = 30 , text{km/h}$$

Explanation

1. Next bus: The next bus leaves at 08:15 PM.
2. Previous bus: Since a bus leaves every 52 minutes, the previous bus left 52 minutes before 08:15 PM, which is at 07:23 PM.
3. Current time: The enquiry officer said the previous bus left 16 minutes ago. So, we add 16 minutes to 07:23 PM, which gives us 07:39 PM.

Therefore, the enquiry officer gave the information at 07:39 PM.

So the correct answer is (B) 07:39 PM.

Explanation

Explanation

Meena's problem-solving rate per minute:
24 problems ÷ 15 minutes = 1.6 problems per minute

In 40 minutes:
1.6 × 40 = 64 problems.

Explanation

To find the speed of the bus, we can use the formula:

Speed = Distance / Time

Plugging in the values given:

Speed = 120 km / 3 hr

Speed = 40 km/hr