Question

a boy goes tobmarket with speed of 20 km per hour and returns back to home with speed of 30 km per hr find average speed​

Answer 1

Explanation:

let x = 20 kmph & y = 30 kmph

then , avg speed = 2xy

. x+ y

>>. ( 2×20×30)/ 50

>>>>>> 1200 / 50

>>>. 24 kmph

hope it's (•‿•) helpful