Explanation

Explanation

Speed of the train relative to man =(10125​)m/sec
=(225​)m/sec
=(225​×518​)km/hr
=45km/hr
Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.
∴x−5=45⇒x=50km/hr.

Explanation

There was sufficient food for 200 student for 31 days. After 27 days 120 days student left

So remaining students =200−120=80

Remaining days =31−27=4 days

Now there is sufficient food for 200 students for days. 

∵ 1 student can take the food =200×4 days

∴ 80 student can take the food = 

80

200×4

​

 =10 days

Extra days =10−4=6 days

Explanation

Total distance = 6,000+6,000=12,000 (from Lahore to Karachi, and then from Karachi to Lahore).

Total time = 22+28=50 hours.

Hence, average speed is 240 km/hr

Explanation

Weight of given sample of CO2​=220mg=220×10−3g

no. of moles (n) =molecular weightWeight of given sample​

                                  =44220×10−3​

                                  =5×10−3=0.005mole

Explanation

• A truck travels at the rate of 80 km per hour.40 km distance travel in 30 minutes
• ****
• Because 30 minutes is a one-half hour, and the truck travels 80 kilometers per hour, the distance traveled is 40 kilometers (80 kilometers x ½ hour = 40 kilometers)
  

Explanation

 Thus, there are 2 values of x for which we'll get to satisfy the given equation.

Now, x^2–5x+6=0 is comparable with ax^2+bx+c=0, where a=1 ,b =-5 and c=6 .

Explanation

Hence, we get the number is 100.

Explanation

Accepted proposal: rejected proposal

75%:25%

75/25:25/25

3:1

Explanation

A:45,54 45+54=99 45-54=9