What is the average speed of a race car(in kilometers per hour)if it travels completely around a 5.0 km track in 1.0 min

Solution:

Given that,

Distance = 5 km

Time taken = 1 minute

We know that,

Find the average speed:

Substituting the values we get,

Thus average speed of a race car is 300 km/hr

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg