Explanation

 1 hour = 820 jumps

30 minutes = (820 ÷ 2) = 410 jumps

Explanation

 To calculate the duration between 21:30 (9:30 PM) and 7:30 (7:30 AM), follow these steps:

Convert to 24-Hour Format:

Departure: 21:30

Arrival: 07:30 (next day)

Calculate Duration:

From 21:30 to midnight (00:00): 2 hours 30 minutes

From midnight to 07:30: 7 hours 30 minutes

Total duration: 2:30 + 7:30 = 10 hours

Therefore, the correct answer is B. 10 Hours.

Explanation

Explanation

Explanation

• 30% of 100 = 30
• 3% of 1000 = 3/100 × 1000 = 30
• So, 30% of 100 is equal to 3% of 1000.

Explanation

To find the mean, add the numbers and divide by the total count:

9 + 0 + 5 + 1 + 0 = 15

Total count = 5

Mean = 15 / 5 = 3

Explanation

Explanation

To find how many more men are needed, we can use the formula for work:

$$text{Work} = text{Men} times text{Days}$$

Initially, 120 men can complete the work in 90 days. The total work can be represented as:

$$120 times 90 = 10800 text{ man-days}$$

Now, we need to find how many men are needed to complete the work in 40 days:

$$text{Required Men} = frac{10800}{40} = 270 text{ men}$$

Explanation

Arithmetic mean of 2, 4, 6, 8, 10, and 12
A.M = Sum of terms / No. of terms
A.M = (2 + 4 + 6 + 8 + 10 + 12) / 6
A.M = 42 / 6
A.M = 7

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.