Question

In 100 m race, A covers the distance in 36 seconds and B in 45 seconds. In this race A beats B by:

A) 20m
B) 25m
C) 22.5m
D) 9m

Answer 1

ㅤㅤㅤㅤ

$\Large\tt\pink{♡\underline{Correct}}$ $\large{\bold{\fbox{\red A}\fbox{\purple n}\fbox{\pink s }\fbox{\orange w}\fbox{\green e}\fbox{\blue R}\red ✿}}$ Is:

(A) 20 m✔

$\Large\mathtt{\green{\underline{\rm Explanatio\rm N}}\pink :}$

Speed of B = $\large\bold\red{ \frac{Distance}{time}}$

                     = 100 / 45 = 20 /9 m/s

Also, Distance = speed * time

Distance covered by B in (45 - 36) seconds

= $\large \bold\red{ (\frac{20}{ 9} \times 9) \:\bold {meters}}$

= 20 m

∴ A beats B by 20 meters.

ㅤㅤㅤㅤㅤㅤ

Answer 2

Answer:

Speed of B = \large\bold\red{ \frac{Distance}{time}}

time

Distance

= 100 / 45 = 20 /9 m/s

Also, Distance = speed * time

Distance covered by B in (45 - 36) seconds

= \large \bold\red{ (\frac{20}{ 9} \times 9) \:\bold {meters}}(

9

20

×9)meters

= 20 m

∴ A beats B by 20 meters.