a car covers the first 30 km at a speed of 60 kmph and the next 20 km at 80 kmph find the average

a car covers the first 30 km at a speed of 60 kmph and the next 20 km at 80 kmph find the average

All playlist •••• ○RRB NTPC prelims (0 6 -0 4 -2016)-1:   • RRB NTPC prelims (0 6 -0 4 -2016) 1   ○RRB Gr D prelims (17-09-2018):   • RRB group D prelims( 17 -09 -2018) – 1   ○RRB NTPC prelims (09-04- 2016):    • RRB NTPC prelims (09-04 -2016)   ○RRB NTPC prelims (10-04- 2016): https://www.youtube.com/playlist?list... ○Algebra Best 150 questions for RRB NTPC group D:    • Algebra Best 150 questions   ○RRB NTPC prelims (11-04- 2016)- 2:    • RRB NTPC prelims (11-04- 2016)- 2   ○RRB NTPC prelims( 11 -04 -2016)-1:    • RRB NTPC prelims( 11 -04 -2016)-1   ○RRB NTPC prelims (12-04 -2016):    • RRB NTPC prelims (12-04 -2016)   ○RRB NTPC prelims (16-04 -2016) -3:    • RRB NTPC prelims (16-04 -2016) -3   ○RRB NTPC prelims (16-04-2016 )-2:    • RRB NTPC prelims (16-04-2016 )-2   ○Geometry Questions:    • Geometry Questions   ○RRB NTPC prelims (16-04-2016)-1:    • RRB NTPC prelims (16-04-2016)-1   ○RRB NTPC prelims( 18 -04 -2016 ):    • RRB NTPC prelims( 18 -04 -2016 )   ○RRB NTPC prelims (19-04 -2016):    • RRB NTPC prelims (19-04 -2016)   ○RRB NTPC prelims (22-04- 2016):    • RRB NTPC prelims (22-04- 2016)   ○RRB NTPC_prelims( 26-04- 2016):    • RRB NTPC_prelims( 26-04- 2016)   ○Trigonometry RRB NTPC/GR. D/SSC CGL/SSC CHSL:    • Trigonometry RRB NTPC/GR. D/SSC CGL/SSC CHSL   ○RRB NTPC prelims (27-04 -2016)-3:    • RRB NTPC prelims (27-04 -2016)-3   ○RRB NTPC MAINS 2017 (CBT EXAM )-1:    • RRB NTPC MAINS 2017 (CBT EXAM )-1   ○Co ordinate Geometry  one shot video:    • Co ordinate Geometry  one shot video   ○RRB NTPC_prelims ( 27-04 -2016) -2:    • RRB NTPC_prelims ( 27-04 -2016) -2   ○RRBNTPC_PRELIMS (27-04-2016)-1:    • RRBNTPC_PRELIMS (27-04-2016)-1   ○RRBNTPC_PRELIMS (28-04-2016)-2:    • RRBNTPC_PRELIMS (28-04-2016)-2   ○RRBNTPC_PRELIMS (28-04-2016)-1:    • RRBNTPC_PRELIMS (28-04-2016)-1   ○RRBNTPC_PRELIMS (29-04-2016):    • RRBNTPC_PRELIMS (29-04-2016)   ○Mensuration Questions:    • Mensuration Questions   ○RRB NTPC  MAINS 2017 (CBT EXAM )-3:    • RRB NTPC  MAINS 2017 (CBT EXAM )-3   ○GEOMETRY  - RRB NTPC / GR D (advance math formula revision):    • GEOMETRY  - RRB NTPC / GR D (advance math ...   ○RRB NTPC MAINS 2017 (CBT EXAM )-2:    • RRB NTPC MAINS 2017 (CBT EXAM )-2   #RRBNTPCMaths #RRBNTPCMAINS #SSCCGL#ssccglmaths#competitivemaths#RRBNTPC_maths#rrbntpc#ssccgl#ssccgl2020#ssccpo2020#sscchsl2020#sscmathon#SSCCHSL #SSC #SSCMATHS#CHSL #CHSL #SSCCHSL #SSCEXAM #SSCCHSL2020 #SSCCHSL2019 #SSCCHSL2019 #NTPC #RAILWAYEXAM #EXAM #SSCCPO #CPO #MATHS #NTPC_MATHS #sscchsl,#sscchsl2019 #ssc_chsl,#chsl_tier_1 #rrb#ntpc#chsl_tier1#ssc_chsl_analysis,#ssc,#chsl,#ssc_chsl_maths_questions #ssc_chsl_2019, #ssc_chsl_2020 #mensuration, #mensuration_tricks, #mensuration #ssc_maths, #cgl_maths_by_Mathon #mensuration_for_bank_po, #mensuration_for_ssc_chsl, #mensuration_hard_questions, #mensuration_in_hindi, #rrb_railway_mensuration_tricks, #maths_by_ , #mensuration_for_cgl, #mensuration_for_ssc , #Complete_Mensuration #cet #cetexam , #common_eligibility_test, #cet2020#लाभ_और_हानि#profit_and_loss, #profit_and_loss_tricks,