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An economic threshold is the insect's population level or extent of crop damage at which the value of the crop destroyed exceeds the cost of controlling the pest.
A train moves at 90 km/h and needs to cover a journey in 2 hours. It halts for 10 minutes at the midpoint. What speed must it take for the second half?
X started to run from point ‘A’ to ‘B’ at a speed of 28 km/hr at 9:00 am and Y started to run from point ‘B’ to ‘A’ at a speed of 12 km/...
A train has to cover a distance of 90 km in 15 hours. If it covers half the journey in 4/5 th of the time, the speed to cover remaining distance in the ...
A car travels from city X to city Y at a speed of 80 km/h and returns to city X at a speed of 100 km/h. If the total distance is 360 km, what is the ave...
Average speed of ‘A’ during a 20-hour journey is 28 km/h. If he covered the first 240 km of his journey at a speed of 20 km/h, then find the speed a...
The downstream speed of a boat is 6 km/hr more than its upstream speed and the ratio of the speed of the boat in still water to the speed of the stream ...
A and B are travelling towards each other with a speed of 30 km/hr and 40 km/hr. They started at same time and A covered 30 km less distance than B befo...
Average speed of ‘A’ during a 24-hour journey is 32 km/h. If he covered the first 160 km of his journey at a speed of 20 km/h, then find the speed a...
The speeds of Ram and Rohan are 40km/hr and 50km/hr respectively. Rohan initially is at a place A and Ram is at a place B. The distance between A and B ...
