Question

show full explanation.......

Answer 1

First he made one attempt keep in mind.

and required to jump=9.000-7.845=1.155

he improves 0.231m every time

so 1.155/0.231= 5

so after first attempt and 5 attempts he reach 9m but when he has to clear the bar he must jump above 9m so another attempt is required

so 1+5+1=7 attempts