Question

15. Ramu and Hari start from a place P at the
same time to reach another place Q. Ramu
travels at a constant speed of 21 kmph,
while Hari starts with a speed of 12 kmph
and increases his speed by 2 kmph at the end
of every hour. If both of them arrive at Q at
the same time, what is the distance between
P and Q and how much time did it take for
each of them to reach Q?​

Answer 1

Answer:

210km,10Hr

Step-by-step explanation:

first we use the formula of AP Sinfinity=n/2(2a+(n-1)d)

Sinfinity=21t

n=t

a=12

d=2

put the values in above equation and find the time.

ans t=10Hr

and after that for distance between P&Q= 21×t

=21×10=210km.