Question

c) A car covered 180 km in 3 hours.
(i) If the car travels at a constant speed, how much distance will it cover in 5 hours?
(ii) A truck covers 450 km in 5 hours. If the car and the truck travel at a constant speed,
which vehicle will travel faster?​

Answer 1

$in \: 3 \: hours \: distance \: covered= \: 180 \: km \\ </p><p>in \: one \: hour \: distance \: covered = \frac{180}{3} = 60 \: km \\ in \: 5hour \: distance \: covered = 60 \times 5 \\ { \large{ \red{ \bold{ \ = 300 \: km}}}}$

$speed \: of \: car = \frac{180}{3} = 60 \: km \: per \: h \\ speed \: of \: truck \: = \frac{450}{5} = 90km \: per \: h \\speed \: of \: truck \: is \: more \: than \: car \\ hence \: truck \: moves \: faster$

${\huge\mathcal{\fcolorbox{lime}{black}{\pink{FROM☞ ADESH \: KUMAR}}}}$

Answer 2

A car covers 180 km in 3 hours and a truck covers 450 km in 5 hours.

(i). If the car travels at a constant speed, then what distance will it cover in 7 hours.

(ii). If the car and the truck start from A and travel to B at a constant speed, then which vehicle will arrive at B first ? Explain your answer.

Solution:

(i) Distance covered by car in 3 hours = 180 km

Distance covered by car in 1 hour = 180÷3

= 60 km

= 60 km per hour

now, 60×7

= 420 km

.

. . A car covers 420 km in 7 hours.

(ii) truck