Max can mow a lawn in 45 minutes. jan takes twice as long to mow the same lawn. if they work together, how long will it take them to mow the lawn?

30 minutes

Step-by-step explanation:

Given:

Max can mow a lawn in 45 minutes

Max mows in 45mins= 1 lawn

Max mows in 1 min= 1//45 lawn

Jan takes twice as long to mow the same lawn

Jan mows in 2(45mins)= 1 lawn

Jan mows in 1 min= 1//90 lawn

Now finding how long will it take,t , them to mow the lawn

1/t= 1/45 + 1/90

1/t= (2+1)/90

1/t= 3/90  

t= 90/3  

t = 30  

If they work together, they will take 30 minutes to mow the lawn !

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

is there a question here?

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