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(5x11a. A car travels first half of journey with 30 km/hr speed and next half with 60 km/hr. Find theaverage speed of the car for entire journeyb. The diameter of a sphere is 2.486 cm Find theunluo uf u |
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Answer» Let the total distance be 2x therefore the car travel s first half distance I.e. x with 30 km/hr time = x/30 hrthe car travel s second half of the distance I.e x with 50km/hrtime = x/50 hrnow,average speed= total distance travelled/total time taken= 2x/x/30+ x/60= 2x/6x+3x/180= 2x/9x*180= 40 km/hr |
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