Question

find the total distance covered by a car in 20 minutes that moves in an uniform speed of 80 kilometre per hour for the first 10 minutes and then with a speed of 60 km per hour for the next 10 minutes​

Answer 1

Step-by-step explanation:

first of 1 min =80÷60

4/3

Answer 2

Answer:

23.33Km or 70/3 Km

Step-by-step explanation:

Given:

Speed of car in first 10 minutes= 80 kmph= 80/60 km/min= 4/3 km per minute

Speed of car in next 10 minutes= 60 kmph= 60/60 km/min= 1 km per minute

Required Formulae:

Distance= SpeedxTime

Solution:

Total Distance travelled in 20 minutes(10+10)= {(4/3)x10} + (1x10)

                                                                          =  (40/3)+10

                                                                          = 70/3 Km

                                                                           =23.33 Km