Explanation

Let the speed of the slower friend be $x$ km/h, then the speed of the faster friend is$x+2$ km/h.

After 1 hour, their total distance apart is the sum of their speeds:

$$x+(x+2)=10$$

Simplifying:

2x+2=10

$$2x=8\Rightarrow$$x=4km/h

So, the slower friend's speed is 4 km/h, and the faster friend's speed is $4 + 2 = 6$ km/h.

Explanation

To find the speed of the car, we need to divide the distance traveled (700 km) by the time taken (3 hours 30 minutes).

First, let's convert the time from hours and minutes to just hours:

3 hours 30 minutes = 3.5 hours (converting 30 minutes to 0.5 hours)

Now, let's calculate the speed:

Speed = Distance ÷ Time = 700 km ÷ 3.5 hours = 200 km/h

So, the correct answer is:

200 km/h

Explanation

To solve this problem, we need to convert the speed from km/hr to m/s and then use the formula:

Time = Distance / Speed

First, let's convert the speed:

63 km/hr = 63 x (1000 m / 3600 s) = 17.5 m/s

Now, let's calculate the time:

Time = Distance / Speed

= 250 m / 17.5 m/s

= 14.3 seconds

Explanation

When boiling multiple eggs together, the cooking time doesn't increase linearly with the number of eggs. 

As long as the eggs are not stacked on top of each other and are fully submerged in water, the cooking time remains roughly the same.

So, it will still take 2 minutes to boil 5 eggs together!

Explanation

10 men complete a job in 14 days, so the total work equals 10 men × 14 days.

With 4 men, the work remains the same, but takes longer.

Multiply the original duration by the ratio of men: 14 days × (10/4) = 35 days.

Therefore, 4 men take 35 days to finish the job at the same rate.

Explanation

Explanation

Speed = Distance / Time = 240 miles / 24 minutes = 10 miles per minute

Now, we need to find the time required to cover 650 miles:

Time = Distance / Speed = 650 miles / 10 miles per minute = 65 minutes

So, the correct answer is: 65 minutes

Explanation

To solve this problem, we can follow these steps:

1. Calculate the total number of letters inserted by all clerks in 2 hours:

•     Clerk A: 1100 letters/hour × 2 hours = 2200 letters
•     Clerk B: 1450 letters/hour × 2 hours = 2900 letters
•     Clerk C: 1200 letters/hour × 2 hours = 2400 letters
•     Clerk D: 1300 letters/hour × 2 hours = 2600 letters
•     Clerk E: 1250 letters/hour × 2 hours = 2500 letters

   Total letters inserted in 2 hours:  

   2200 + 2900 + 2400 + 2600 + 2500 = 12600 letters

2. Determine the remaining letters to be inserted:

•     Total letters to be inserted: 24,000
•     Letters already inserted: 12,600

   Remaining letters: 24,000 - 12,600 = 11,400 letters

3. Calculate the rate of the remaining clerks (A, B, and E) per hour:

•     Clerk A: 1100 letters/hour
•     Clerk B: 1450 letters/hour
•     Clerk E: 1250 letters/hour

   Total rate of A, B, and E:  

   1100 + 1450 + 1250 = 3800 letters/hour

4. Calculate the time required to insert the remaining letters:

•     Time required = Remaining letters / Rate of A, B, and E
•     Time required = 11,400 letters / 3800 letters/hour = 3 hours

Answer: More than 2 hr, but less than 4 hr.

Explanation

Convert the time from 9:55 a.m. to 10:15 a.m. to a fraction of an hour:

20 minutes = 20/60 = 1/3 hour

Multiply the rate (40 km/h) by the time (1/3 hour):

40 km/h × 1/3 h = 40/3 km

40/3 km = 13 1/3 km

So, the motorist travels 13 1/3 kilometers.

Explanation

The hurdles used in the men's 110-meter hurdles race are set at a height of 1.067 meters (42 inches).