Question
Kerria sp. is a …. species of lac
insect.Solution
Kerria sp. is a bivoltine species of lac insect.Kerria are generally bivoltine with two broods in a year. Some species like K. laccamysorensis (host plant-Sal), and K. sharda (host plant-Kusum)Â are tri-voltine having three broods in a year. Again, species of the genus Paratachardia(host plants-Tea, Sandal, etc.,) are all univoltine.
The speed of train A is 120 km/h and it takes 15 seconds to cross a pole. Find the approximately time taken by train A to cross train B that is running ...
- A man is running at 5 m/sec in the same direction of a train. The train crosses him in 5 seconds. If the train’s speed is 90 km/hr, find the time it take...
Two trains of same length are running in parallel tracks in the same direction with speed 84 km/hr and 120 km/hr respectively. The latter completely cro...
A train running at 54 km/h crosses a man running in the same direction at 6 km/h in 18 seconds, and also crosses a bridge in 45 seconds. Find:
(a...
Train ‘A’ travelling with a speed of 80 km/h can cross a pole in 9 seconds. If the length of train ‘B’ is 20% less than that of train ‘A’ an...
A 300 m train crosses a platform in 24 s and a man standing on it in 18 s. Find the platform’s length.
A train started from station P and preceded towards station Q at a speed of 90 km/h. 42 minutes later, another train started from station Q and preceded...
A train passes 150 m long platform in 10 seconds and a man standing on the platform in 8 seconds. Find the speed of the train?
A train can cross a pole in 10 seconds while it can cross a 360 metres long platform in 30 seconds. Find the time (in hours) taken by the train to cover...
Speeds of train 'A' and train 'B' are in the ratio 2:3, respectively. Train 'B' can completely overtake train 'A' in 300 seconds. If lengths of train 'A...