Question

Raj takes a taxi to the airport. He expects the taxi to travel at an average speed of 50 mph.

The distance from Raj's house to the airport is 60 miles.
If Raj's taxi actually travels at an average speed of 40 mph, how many more minutes does the journey take than expected?

Answer 1

18 minutes

Explanation:

the formula for speed is distance/time, but we're trying to find the amount of time.

If you multiply both sides by time, you get (speed)(time)=distance.

divide by speed on both sides.

Time=distance/speed.

now that we have the correct formula, substitute the values.

60 miles/50 mph = 1.2 hours.

we need how many minutes though, so we multiply 1.2 by 60.

that's 72 minutes. he expected to reach in 72 minutes.

now do that for the actual speed, and you get

60 miles/40 mph = 1.5 hours.

multiply by 60 again.

That's 90 minutes. he actually reached in 90 minutes.

to find how many more minutes it took, simply subtract the actual amount of time by the expected amount of time. 90-72=18 minutes.

the answer is 18

Answer 2

An 1 hour and 30 mins or 90 minutes.