The distance of 180 km between Delhi and Agra is covered by John in 2 hours and by Jill in 3 hours. If John starts from Delhi towards Agra at 8 a.m. and Jill starts from Agra towards Delhi at 9 a.m., at what time will they meet?
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let us take d=180 km
john covers in 2 hours ,so speed =90km/hr or 1.5 kms/min
jill covers in 3 hours ,so speed=60km/hr or 1km/min
if john starts by 8.am ,in 1hr 30 minutes he will cover 135 kms.
if jill starts by 9.am and in 30 minutes he will cover 30 kms.
from the above by 9.30 am both will be 15 kms away.
after 6 minutes jonn will cover another 9 kms and will be at 144 th km from delhi.
after 6 minutes jill will cover another 6 kms and will be at 36 th km from agra.
so they will be meeting at 9.36 am.
john covers in 2 hours ,so speed =90km/hr or 1.5 kms/min
jill covers in 3 hours ,so speed=60km/hr or 1km/min
if john starts by 8.am ,in 1hr 30 minutes he will cover 135 kms.
if jill starts by 9.am and in 30 minutes he will cover 30 kms.
from the above by 9.30 am both will be 15 kms away.
after 6 minutes jonn will cover another 9 kms and will be at 144 th km from delhi.
after 6 minutes jill will cover another 6 kms and will be at 36 th km from agra.
so they will be meeting at 9.36 am.
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