Explanation

Explanation

ایک لیٹر میں کتنا کرتی ہے

150/20 = 7.5

 تین سو بیس لیٹر میں کتنا کرے گی

320/7.5 = 42.67

Explanation

Convert the speed from km/hr to km/s:

Given speed = 90 km/hr

1 km = 1000 m

1 hr = 3600 s

Speed = 90 * 1000 / 3600 = 25 m/s

Calculate the time taken using the formula time = distance / speed:

Given distance = 450 km = 450000 m

Time = 450000 m / 25 m/s = 18000 s

Convert the time from seconds to hours:

1 hr = 3600 s

Time = 18000 s / 3600 = 5 hrs

Explanation

Speed of the two trains: 60 km/hr and 90 km/hr

If train cross each other, then effective speed = 60 + 90 = 150 km/hr

Length of first train = 1.10 km or 1100 m

Length of second train = 0.9 km or = 900 m

formula

Speed = Distance/Time

⇒ 150 × (5/18) = 2000/Time

⇒ 125/3 = 2000/Time

⇒ Time = 2000 × (3/125)

∴ Time = 48 seconds.

Relative speed = 60 + 90 = 150 km/hr. = 150 x 5/18 = 125/3 m/sec. Distance covered = 1.10 + 0.9 = 2 km = 2000 m. Required time = 2000 x 3/125 = 48 sec.

Explanation

Speed of train relative to jogger = (45−9) km/hr = 36 km/hr

=(36×185​)m/sec

= 10 m/sec.

Distance to be covered = (240+120)m=360m.

∴ Time taken =(10360​)sec

=36sec.

Explanation

Mrs. Kamaran wishes to renovate her cottage. She hires the service of a plumber and a carpenter. a painter an electrician, and an interior decorator. The renovation is to be completed in a period of one working week i.e. Monday to Friday. Every worker will be taking one complete day to do his job. Mrs.Kamran will allow just one person to work per day.

1. The painter can do his work only after the plumber and the carpenter have completed their jobs.
2. The Interior decorator has to complete his job before that of the electrician.
3. The carpenter cannot work on Monday or Tuesday

Question: 

In Case the painter works on Thursday, which among the following alternatives is possible

A. The election works on Tuesday

B. the election works on Friday

C. the interior decorator does his work after the pinter

D. plumber and the painter work on consecutive days

E. Mrs. Kamran Cannat Fit All of the Workers into the Schedule

Explanation

Explanation

 Convert the speeds of the trains from km/h to m/s

1 km/h = 1000 m/3600 s

Speed of the first train = 60 km/h = (60,000 m/3600 s) m/s = 16.67 m/s.

Speed of the second train = 45 km/h = (45,000 m/3600 s) m/s = 12.50 m/s.

Relative speed = Speed of the first train - Speed of the second train = 16.67 m/s - 12.50 m/s = 4.17 m/s.

Distance = Length of the second train = 500 meters.

Using the formula:

Distance = Speed × Time

Time = Distance / Relative speed = 500 meters / 4.17 m/s = 120.05 seconds.

To convert the time from seconds to minutes, we divide by 60:

Time in minutes = 120.05 seconds / 60 = 2 minutes (approximately).

Therefore, the first train will cross the second train after approximately 2 minutes.

Explanation

Given:  

- Pages read = 24  

- Time = 15 minutes  

Rate = Pages ÷ Time = 24 ÷ 15 = 1.6 pages per minute

Explanation

 Efficiency of A = 10/5 =2 

Efficiency of B = 5/10 = 0.5 

No of page typed by A in 30 min

= 30 x 2 = 60 

No of page typed B in 30 min 

= 30 x 0.5 = 15 

total page together is 60 + 15 = 75