Question

anshu travells 30 minutes at a speed of 50 km / hr in 1 hr at a speed of 50 kn/ hr, 20 minutes at a speed of 30 km / hr at a apeed of 60 km / hr ? what it is average speed ?​

Answer 1

Answer:

630/13 KM/HR

Step-by-step explanation:

HERE ( CONVERT MIN IN HR)

DATA GIVEN : TOTAL TIME : 30 MIN + 6O MIN+ 20 MIN + 20 MIN = 130 MIN

WHICH IS 130/60 HRS

DISTANCE = SPEED × TIME IN HR

TOTAL DISTANCE ( CONVERT ALL MIN IN HR)

IS 50×30/60 + 50× 1 + 30× 20/60 + 60×20/60

= 25 + 50 + 10 + 20 = 105 KM

THEREFORE

AVG SPEED = TOTAL DISTANCE / TOTAL TIME

= 105/ 130÷60

105×60/130

105×6/13

630/13 KM/HR