[ Chapter 7] Time And Distance (Math Solution ) SwiftSolver Swift Solver

[ Chapter 7] Time And Distance (Math Solution ) SwiftSolver Swift Solver





Question 1: A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?
एक आदमी 600m लंबी सड़क को 5 मिनट मे पार करते हैं. उन आदमी की स्पीड कितनी है km /h में



Answer :

Distance = (240 x 5) = 1200 km.

Speed = Distance/Time

Speed = 1200/(5/3) km/hr.     [We can write 1 hours as 5/3 hours]

Required speed =		1200 x	3	km/hr	= 720 km/hr.
			5

Question 2:

If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:

अगर कोई आदमी 10 km/h के बजाय 14 km/h 

Answer : 

Let the actual distance travelled be x km.

Then,	x	=	x + 20
	10		14

 14x = 10x + 200

 4x = 200

 x = 50 km.