Question

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Answer 1

Answer:

1 let the ratio 5x & 3x

5x + 3x =720

8x = 720

x=90

5x = 450

3x=270

Answer 2

Answer:

2.48km/hr

Original speed of the CAR

Step-by-step explanation:

DISTANCE= 240mtrs

LET THE ORIGINAL SPEED BE 'x'km/h

Time taken to cover the distance=

dist/speed= 240/x

IF ORIGINAL SPEED IS DECREASED BY 8km/h

=> (x - 8)km/h

Time taken to cover the distance after the speed is decreased

=> 240/(x-8)

IT IS GIVEN THAT TIME TAKEN TO COVER THE DISTANCE AFTER THE SPEED DECREASED IS 1HR MORE THAN THE ORIGINAL TIME

=> (240/x-8)-(240/x) = 1

BY SOLVING THIS EQUATION WE GET

x= 48km/hr

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