Question

Q3. The speed of a car is 70 km/hr. It is decreased by 20%. Find the new speed of the car. ​

Answer 1

Answer:

Step-by-step explanation:

Distance covered in the first 2 hours = (70 x 2) km = 140 km

Distance covered in the next 2 hours = (80 x 2) km = 160 km

Remaining distance = 345 - (140 + 160) = 45 km Now, speed in the fifth hour = 90 km/hr

∴ Time taken to cover 45 km = (  

90

45

​

)hr=  

2

1

​

hr

∴ Total time taken = (2+2+  

2

1

​

)hr=4  

2

1

​

hrs