Which of the following is a non-metal required by the human body?
Iodine is a chemical element. The body needs iodine but cannot make it. The iodine needed by the body must come from the diet.
A driver of truck sees an ambulance 160 meters ahead of him. After 20 seconds the ambulance is 140 meters behind. If the speed of the truck is 80 kmp/h,...
The speed of a scooter is 80 km/h and it takes 5 hours to cover a certain distance. A car covers the same distance in 4 hours. If the speed of the scoot...
A boy can swim a certain distance downstream in 5 hours and return in 7 hours. If the rate of stream is 4 kmph then what is the speed of boy in still wa...
Rajesh drove at the speed 100 km/hr from his home to a resort. While returning he got struck in traffic and took 6 more hrs; he could drive only at the ...
P can run 1km in 5 minutes 10 seconds and Q in 5 minutes 20 seconds. How many meters start can P give Q in a kilometer race so that the they both reach ...
A truck covers 376 km at a certain speed in 8 hours. How much time would a car take at an average speed of 13 km/h more than that of the speed of the tr...
‘A’ and ‘B’ started moving towards each other at same time with a speed of 21 km/hr and 15 km/hr, respectively. If the distance covered by ‘Aâ...
Train P starts from Lucknow to Dehradun at 11:55 am with an average speed of 55 m/s. Train Q starts from Dehradunto Lucknowat 1:35 pm with an average sp...
Ratio of speeds of ‘A’ and ‘B’ is 11:13, respectively. If they participate in a 130-metre race and ‘B’ gives ‘A’, a head start of ‘mâ€...
X started to run from point ‘A’ to ‘B’ at a speed of 32 km/hr at 9:00 am and Y started to run from point ‘B’ to ‘A’ at a speed of 16 km/...
