(Q.1)  A woman walks a certain distance in 84 min. she covers two third of it at 4 km/h and the rest at 5 km/h.           find the total distance she covered.

(Q.2)  A man walks at 6 km/h and runs at 8 km/h. He covers 6km in 50 min partly by running and partly by                 walking.

(i) for how long did he walk?  (ii) What distance did he cover walking?

(Q,3) the speed of the train is 30 km/h. how long will it  take to cross a signal if its length is 25 m?

(Q.4) How long will a 50m- long train travelling at 72 km/h take to cross a pole?

Asked by bishtbharat869 | 9th Aug, 2019, 08:48: PM

Expert Answer:

Q1
let space the space total space distance space equals space straight x space km
Part space 1
Distance space equals space 2 over 3 straight x
speed space equals space 4 space km divided by hr
time space equals space straight x over 6 space hrs space equals straight x over 6 cross times 60 equals space 10 straight x space mins
Part space 1
Distance space equals space 1 third straight x
speed space equals space 5 space km divided by hr
time space equals space straight x over 15 space hrs space equals space 4 straight x space mins
total space mins space equals space 84
84 space equals space 10 straight x space plus space 4 straight x
straight x equals 6 space km
Only one question will be answered per query

Answered by Arun | 12th Aug, 2019, 10:50: AM