Mr Raj walked 420 m at a speed of 105

Berikut ini adalah pertanyaan dari angelicaheartylina25 pada mata pelajaran Matematika untuk jenjang Sekolah Dasar

Mr Raj walked 420 m at a speed of 105 m/min from the bus interchange to the swimming complex. He then took 3 min to walk from the swimming complex to his home. Mr Raj walked a total distance of 896 m. (a) Find the total time taken for the whole journey. (b) Find Mr Raj's average speed for the whole journey.​

Jawaban dan Penjelasan

Berikut ini adalah pilihan jawaban terbaik dari pertanyaan diatas.

Jawaban:

a. 7 minutes

b. 128 m/min

Penjelasan dengan langkah-langkah:

given that:

total distance = 896 m

distance from bus int. to swim comp. = 420 m

speed from bus int. to swim comp. = 105 m/min = 1.75 m/s

time from swim comp. to home = 3 minutes

question:

a. total time

b. average speed

answer:

a. total time

total time = (time from bus int. to swim comp.) + (time from swim comp. to home)

= (420 m ÷ 1.75 m/s) + 3 minutes

= 240 s + 180 s

= 420 seconds

= 7 minutes

b. average speed

average speed = total distance / total time

= 896 m/7 minutes

= 128 m/minutes

= 2.13 m/s

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Last Update: Sat, 08 Apr 23