Question

a boy run 20 km in 2.5 h.how long will he take to run 32 km double the previous speed?​

Answer 1

Answer:

2 hrs

Step-by-step explanation:

20 km in 2.5 hrs

d=20km, t=2.5h

speed = 20/2.5 = 8km/h

now d=32km, speed=16km/h

t=d/v

t=32/16 = 2km/h

Answer 2

(First Case)Given,
Boy runs 20km in 2.5hours
We know,
Speed=Distance/Time
=20km/2.5hrs=8km/h
(Second Case),
Double the speed=8km/h*2=16km/h
Speed=Distance/Time
16km/h=32km/Time
Time=32km/16km/h
=2hrs
Therefore,The boy will travel 32 kms in 2hrs at a speed of 16kmph