Answer:
40 min is the answer
Step-by-step explanation:
To solve this we need to convert all the units into SI units
for ritu,
speed= 90km/hr
= 90 × 1km/ 1hour
= 90×1000/3600 m/s
= 25m/s
distance = 120×1000m
time = distance/ speed
= 120000/25
= 4800sec
= 4800/60min
= 80 min
for garima,
distance =120×1000m
speed = 60km/hr
= 60×1000/3600 m/s
=100/6 m/
time = 120000/(100÷6)
= 7200sec
= 7200÷60 min
= 120 min
time difference is 120-80 = 40 min
The answer to your question is 60
Yes it is.
F1 = k q1 * q2 / r^2
F2 = k *(2*q1) * (4.8 q2) / (7.2 r^2)
Work on F2 for a moment.
F2 = k * 9.6 (q1*q2) / 51.84
F2 = (9.6/ 51.84) * k * q1 * q2 / r^2
Since k * q1 * q2/r^2 is the same in both questions let kq1*q2/r^2 = m
F1 = m
F2 = 0.18 m
So to make it easier F2/F1 = 0.18m / m
F2/ F1 = 0.18 the m's cancel.
And that should be how you do the question.
Https://media.education2020.com/evresources/2090439_d5cda3c0-18fe-4e0b-a7b1-7bdb7de4a90f.png https://media.education2020.com/evresources/2090439_bd5347b3-dbdd-4b20-b6db-8fb382f5a76d.png https://media.education2020.com/evresources/2090439_1e3de77c-6df9-4b45-ad4c-56429490d390.png https://media.education2020.com/evresources/2090439_498e0624-1784-4848-b67a-36dfbd500a8b.png
Thats the wepsite if u want to see the answer. good luck!
