A parachute descends at the rate of 25m/min. At a particular time, it was at a height of 1850m above the ground level. Time taken to reach the height of 250m above the ground level is..?
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4
Answer:
Given speed of parachute=25m/min
At a point the distance of parachute from ground level was= 1850m
The final destination=250m
Distance that the parachute had to cover 1850m-250m=1600m
Distance/speed=Time
1600m/25m/min= 84 min or 1 hour 24 minute
Answered by
1
Step-by-step explanation:
s = ut + 1/2 gt²
=-1600= (25t/60) -(1/2 × 10t²)
= 5t² - 5/12t - 1600 = 0
= 12t² - 5t - 3840 = 0
= t = 18.31 sec
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