Question

a train travels first 15km with a uniform speed of 45km/h, the next 75 km with uniform speed of 55km/h, and the last 10km at uniform speed of 35m/h calculate the average spood of the train.

Answer 1

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հίί ʍαtε_______✯◡✯
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һєяє' ʏȏȗя ѧṅśwєя ʟȏȏҡıṅɢ ғȏя________
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✯Total time taken ,

.t1 = 15 / 30

.= 0.5 s

●=》
.t2 = 75 / 50

= 1.5 s

●=》
t3 = 10 / 35

=0.2

♦total time taken for the entire journey =

0.5 + 1.5 + 0.2 = 2.2

♦total distance travelled = ( 15 + 75 + 10) km

=》100 km

so,
▶Average speed =

$\frac{100}{2.2} = 45(aprox)$

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$hope \: it \: helps$
★BRAINLY★

Answer 2

✯Total time taken ,

.t1 = 15 / 30

.= 0.5 s

●=》

.t2 = 75 / 50

= 1.5 s

●=》

t3 = 10 / 35

=0.2

♦total time taken for the entire journey =

0.5 + 1.5 + 0.2 = 2.2

♦total distance travelled = ( 15 + 75 + 10) km

=》100 km

so,

▶Average speed =

\frac{100}{2.2} = 45(aprox)

2.2

100

=45(aprox)