PROBLEMS ON ADDING HOURS AND MINUTES

Calculate the sum of each pair of items.

Problem 1 :

Solution :

So, the answer is 7 hour 59 minutes.

Problem 2 :

Solution :

So, the answer is 23 hours 58 minutes.

Problem 3 :

Solution :

Every 60 minutes is 1 hour.

97 minutes = (60 + 37) minutes

= 1 hour 37 minutes

= (27 + 1) hours 37 minutes

28 hours 37 minutes.

So, the answer is 28 hours 37 minutes.

Problem 4 :

Solution :

So, the answer is 27 hours 9 minutes.

Problem 5 :

Solution :

So, the answer is 13 hours 36 minutes.

Problem 6 :

Solution :

So, the answer is 28 hours 53 minutes.

Problem 7 :

Solution :

37 hour 69 minutes

69 minutes = (60 + 9) minutes

60 minutes = 1 hour

(37 + 1) hour and 9 minutes.

38 hour and 9 minutes

So, the answer is 38 hours 9 minutes.

Problem 8 :

Solution :

So, the answer is 16 hours 42 minutes.

Problem 9 :

Solution :

So, the answer is 40 hours 45 minutes.

Problem 10 :

Solution :

So, the answer is 23 hours 59 minutes.

Problem 11 :

John exercises for 1 hour and 30 minutes in the morning and 45 minutes in the evening. How many minutes does he exercise in total ?

Solution :

Time taking for morning exercise = 1 hour 30 minutes

Time taking for evening exercise = 45 minutes

Total time taken :

1 hour 75 minutes = 1 hour and (60 + 15) minutes

= 1 hour and 1 hour 15 minutes

= 2 hour 15 minutes.

Time taken for exercise is 2 hour 15 minutes.

Problem 12 :

Sarah exercises for 45 minutes every Monday, Wednesday, and Friday. How many hours does she exercise in a week ?

Solution :

On Monday she is doing 45 minutes exercise.

On Wednesday, she is doing 45 minutes exercise on Friday also she is doing 45 minutes.

= 45 x 3

= 135 minutes

= (120 + 15) minutes

= 2 hour 15 minutes.

Problem 13 :

In a 5K race, Emma finishes in 28 minutes and 15 seconds, while David finishes in 32 minutes and 30 seconds. How much faster is Emma than David ?

Solution :

Time taking by Emma :

= 28 minutes 15 seconds

Time taking by David :

= 32 minutes 30 seconds

32 - 28 = 4 minutes

30 - 15 = 15 seconds

David is 4 minutes and 15 seconds faster than Emma.

Problem 14 :

Tom ran a mile in 8 minutes and 30 seconds. What is his average speed in miles per hour ?

Solution :

Distance covered = 1 mile

= 8 minutes + 30 seconds

= 8x60 + 30

= 480 + 30

= 510 seconds

1 hour = 60 minutes, 1 minute = 60 seconds.

1 hour = 3600 seconds

= 1/3600 miles per hour

Problem 15 :

Lisa wants to complete a 30 - day fitness challenge. If she exercises for 40 minutes each day, how many hours will she spend exercising in total ?

Solution :

Each day he is taking 40 minutes.

In 30 days, he is taking = 40 x 30

= 1200 minutes

= 20 hours.