Question

With solution please?

Answer 1

Answer:

Explanation:

speed= distance/time

let the distance travelled by ball be x

so 20 = x/t

=> x=20t - eq 1

now distance travelled by stone will be 30-x ( as total dis is 30)

speed of free fall or gravity= 10m/s

so 10= (30-x)/t - eq2

putting the value of x in ep2 we get

10t=30 - 20t

=>t= 1s

arigato gozaimas /_ \

merci beaucoup

asante sana

dhanyavadalu

thank you ;-)