For the following questions answer them individually
In a stream running at 3 km/h, a motorboat goes 12 km upstream and back to the starting point in 60 min. Find the speed of the motor boat in still water. (in km/h)
Find the product of $$(a + b + 2c)(a^{2} + b^{2} + 4c^{2} - ab - 2bc - 2ca)$$
What is the remainder when we divide $$5^{70} - 7^{70}$$ by 24 ?
What is the area of a triangle whose sides are 3 cm, 5 cm and 4 cm?
A man sold two gifts at ₹30 each. On one gift he gained 18%, and on the other gift he lost 18%. What is his over all gain/loss (in ₹)?
By what number must the given number be multiplied to increase the number by 25%
In $$\triangle$$ ABC,D is a point on BC such that AD is the bisector of $$\angle$$ A, AB = 11.7 cm, AC = 7.8 cm and BC = 13 cm. What is the length (in cm) of DC?
The length of each equalside ofan isosceles triangle is 15 cm and the included angle between those twosidesis 90°.Find the area ofthe triangle.
A trader marks his goods at 60% above the cost price and allows a discount of 25%. What is his gain percent?
The following table shows the percentage distribution of the population of five states, A, B, C, D and E on the basis of the poverty line and also on the basis of sex.
If the male population above the poverty line for State B is 2.5 million, then what is the total population of State B?