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Time Speed Distance 1/5

25. Two men A and B walk from P to Q, a distance of 21 km at 3 km/h and 4 km/h respectively. B reaches at point Q and returns immediately and he meets A at point R. Find the distance from P to R.
a. 15 km
b. 18 km
c. 20 km
d. 24 km


26. Buses take 12 hr to cover the distance of 120 km between A and B. A bus starts from point A at 8.00 a.m. and another bus starts from point B at 10.00 a.m. on the same day. When do the two buses meet?
a. 2 pm
b. 3 pm
c. 4 pm
d. 5 pm


27. Ravi started cycling along the boundaries of a square field from corner point A. After half an hour, he reached the corner point C, diagonally opposite to A. If his speed was 8 km/hr. what is the area of the field in square km ?
a. 64
b. 8
c. 4
d. Cannot be determined


28. A man walking at 3 km/hr crosses a square field diagonally in 2 min. The area of the field is :
a. 2500 ${m^2}$
b. 3000 ${m^2}$
c. 5000 ${m^2}$
d. 6000 ${m^2}$


29. A cart has to cover a distance of 80 km in 10 hours. If it covers half of the journey in (3/5)th time, what should be its speed to cover the remaining distance in the time left?
a. 8 km/hr
b. 20 km/hr
c. 6.4 km/hr
d. 10 km/hr.


30. The ratio between the rates of walking of P and Q is 2 : 3. If the time taken by Q to cover a certain distance is 36 minutes, the time taken by P to cover that much distance is :
a. 24 min
b. 54 min
c. 48 min
d. 21.6 min