In a race of 1200 m, Ram can beat Shyam by 200 m or by 20 sec. What must be the speed of Ram?
A14 m/sec
B12 m/sec
C10 m/sec
D16 m/sec
Answer:
B. 12 m/sec
Read Explanation:
Ram beats shyam by 200 m or 20 sec
shyam covers 200m distance in 20 sec
Speed of shyam = 200/20 = 10m/s
in 1200m race ram beats shyam by 200m
distance covered by ram = 1200m
Distance covered by shyam = 1000m
, 1000 m distance is covered by shyam in = 10m/s
1200 m distance will be covered by ram = 10/1000 × 1200 = 12m/s