Mathematics - 0580 CIE

Rates

Gbogbo ọrọ náà

A rate compares two different quantities, such as distance and time, or cost and weight. The most important rate at IGCSE is speed, but the same idea covers price per kilogram, flow per minute and many more. Rates turn raw figures into something you can compare and use.

In this lesson you will use common measures of rate, apply them to less familiar situations, and solve problems involving average speed, including the key relationship between speed, distance and time.

Ebumnobi

Use common measures of rate.
Apply other measures of rate.
Solve problems involving average speed.

Nkuzi Olu

Gee ntị na nkuzi a na ngwa

Maapụ uche

E seela isiokwu a ka ị hụ otu echiche si ejikọta.

Mepee maapụ uche na ngwa

Kaadị ncheta

Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.

Mee omume kaadị ndị a na ngwa

Akwụkwọ Ọmụmụ

Rates let you compare things fairly (which product is better value, which journey is faster) and they are the foundation of the distance-time and speed-time graphs you meet later.

Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge

Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.

Akwụkwọ ndụmọdụ zuru oke nwere eserese

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Nnyocha Ọmụmụ

Ekele diri gi maka imecha ihe karịrị na Rates. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

A car travels 150 km in 2.5 hours. What is its average speed? A. 50 km/h B. 60 km/h C. 75 km/h D. 375 km/h Answer: B
A worker earns $54 for 6 hours. What is the rate of pay per hour? A. $6 B. $9 C. $48 D. $60 Answer: B
How far does a cyclist travel in 3 hours at 12 km/h? A. 4 km B. 15 km C. 36 km D. 4 h Answer: C
A train covers 90 km at 45 km/h. How long does it take? A. 0.5 h B. 2 h C. 45 h D. 135 h Answer: B
30 minutes expressed in hours is: A. 0.3 h B. 0.5 h C. 3 h D. 30 h Answer: B

Rue ajuju ndi a n'ime ngwa ahu