the speed of light is about 1.86 x 10^5 miles per second. find the speed of light in (a) km per second, (b) km/min, (c) m/h. (a mile is approximately 1.61 km.)

Answer 1

1 mile = 1.61 km
1.86x10^5 miles = 1.61(1.86x10^5) km
1.86x10^5 miles/sec = 2.99x10^5 km/sec

= 1.80 x 10^7 km/min ----> multiplied by 60
= 1.08 x 10^9 km/hour ---> multiplied by another 60