ek cycle sawaar kisi duri ko 10km/H ki chaal se chalkar 2 ghante me taye karta hai. yadi veh 15km/h ki chaal se chale to us duri ko kitne samaye me taye karega
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answer --> 1 hr 20 mins
reason --> s=d/t
d=20km
new speed= 15 km
distance= 20 km
time = 20/15 = 4/3
= 1 1/3 hour
= 1 hour 20 minutes
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