⟩ A super fast bus of KSRTC starting from Trivandrum and reaches Attingal in 45 minutes with an average speed of 40 km/hr. If the speed is increased by 10 km/hr how much time it will take to cover the same distance?(a) 34 minutes (b) 36 minutes (c) 38 minutes (d) 40 minutes
b) 36 min
d=s*t
s=40 km/hr=40/60km/min
t=45min
d=(4/6)*45=30km
now increased speed= 50 km/hr=50/60 km/min
d=30 km
t=d/s
= 36 min