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Bacillus thuringiensis is widely used in agriculture for the control of insect pests. It is used to kill beetles and the larvae of mosquitoes, black flies, and moths. Bt is also toxic to nematodes.
The average weight of five friends A, B, C, D and E is (x+8) years while the average weight of C and E is (x-8) kg. If the weight of another person F is...
The ratio between the number of sides of two regular polygons is 1 : 2 and the ratio between their interior angle is 2 : 3. Then the number of sides of ...
The radius of a cylinder is increased by 20%, and its height is decreased by 10%. Find the percentage change in the volume of the cylinder.
(180/3)% of the raindrops could have been collected, when 8 cm of rain has fallen on a part of land of area 2.5 km2, in a tank having a 200 m...
The circumference of a circle is 44 cm and the length of the rectangle is 4 times the radius of the circle. Find the area (in cm2) of the rec...
A wire is bent to form a square whose sides are of 11 cm. If the same wire is bent to form a circle, then find the area (in cm2) of the circl...
The ratio of length to breadth of a rectangle is 5:4, respectively. Perimeter of rectangle is 252 cm. If each side of a square is 25% more than the brea...
An edge of a variable cube is increasing at the rate of 2 cm/s. How fast is the volume of the cube increasing when the edge is 12 cm long?
If A’s income is 60% more of B’s income and B’s income is 40% less than C’s income, then by what percent is C’s income mor...
A tank 60m long, 45m broad and 18m deep is dug in a ground 2000 m long and 45m wide. By how much will the level of the field rise if earth dug out of t...
