A commercial jet has been instructed to climb from its present altitude of 6000 feet to a cruising altitude of 30,000 feet. If the plane ascends at a rate of 4000 ft/min, how long will it take to reach its cruising altitude? The plane will take nothing minutes.
An easier way of doing this would be to subtract the initial attitude from the final attitude and divide by the rate of increase = 30000 - 6000÷4000 = 24000÷4000 =6mins
