Question

A car travels at 54 km/h for the first 20 seconds , 36 km/h for the next 30 seconds and finally 18 km/h for the next 10 seconds . find its average speed?

Answer 1

Km traveled in first 20 sec is (54/18)/10 = 0.3 km
Km traveled in next 30 sec is (36/12)/10 = 0.3 km
Km traveled in next 10 sec is (18/36)/10 = 0.05 km
Total km traveled in 1 min = 0.3 + 0.3 + 0.05 =0.65
Average speed = 0.65*60 = 39 kmph

Answer 2

Explanation:

$\huge{\fbox{\fbox{\pink{HELLO}}}}$

$\huge{\fbox{\fbox{\orange{Answer =>}{\green{In}{\purple{Attachment}}}}}}$

$\huge{\fbox{\fbox{\bigstar{\pink{Sukhmandeep}}}}}$

  $\huge{\fbox{\fbox{\blue{Mark}{\red{as}{\purple{brainliest}}}}}}$