EM-1851

Forming equations from word problems

E Math · Secondary 4 · Hard · Forming equations from word problems

A car travels at a constant speed of

v

km/h. It covers a distance of

120

km in

t

hours.

(a) Express

t

in terms of

v

.

(b) The car then increases its speed by

20

km/h and now takes

1

hour less to cover the same distance. Form an equation in

v

and simplify it to

v^2 + 20v - 2400 = 0

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