Question

some cars and autorikshas are parked in front of a hospital.the total number of cars and autorishaws are 20 and the total number of wheels are 69.how many cars are there​

Answer 1

Answer:

9

Step-by-step explanation:

let no. of car = x

let no. of rikhsa = y

A/c to ques,

x+y=20...........(i)

we know that car have 4 wheels, therefore

total no.of car wheel =4x

similarly,

total no.of rikhsa wheel=3y

A/c to ques,

4x+3y=69..........(ii)

multiply eq (i) by 3 and subtract from eq (ii), we get

4x+3y=69

-3x-3y=-60

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x=9 and y= 11

so 9 cars are there and 11 riksha are there