If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same work in 2 days, then what is the time taken by 15 men and 20 boys to complete the same type of work?

A plot of land is in the form of a quadrilateral where one of its diagonals is 100 m long. If two vertices on either side of this diagonals are 50 m away from the diagonal. Find the area of the plot of land

If "NOIDA" is written as 39658, how will"INDIA" be written?

Read the following statements :
1. Either A and B are of the same age or A is older than B
2. Either C and D are of the same age or D is older than C
3. B is older than C
Which one of the conclusions can be drawn from the above statements?

The minute hand of a circular clock is 14 cm long and that of hour hand is 7 cm. Find how far does the tip of the minute and hour hand move in 30 minutes?

A heap of paddy is in the form of a right circular cone whose diameter is 4.8 m and height 1.8 m. If the heap is to be covered exactly by a canvas to protect it from rain, find the area of the canvas required.

If $a^{x}$= b,$b^{y}$ = c,$c^{z}$ = a, then what is the value of xyz ?

Arrange the following in the order of increasing solubility in water
(i)$NaHCO_{3}$ (ii) $KHCO_{3}$ (iii) $Mg{(HCO_{3})}_2$ (iv) $ca{(HCO_{3})}_2$

Match the following :
Actinide element Atomic number
(a) Plutonium 1. 102
(b) Curium 2. 1OO
(c) Fermium 3. 96
(d) Nobelium 4. 94
(a) (b) (c) (d)

Match the Number of electrons transferred (a) when one mole of $KMnO_4$ is reduced to (b)
(a) 1, 3, 4, 5
(b) $Mn_{2}O_3$, $MnO_2$, $Mn{O_4^2}^-$, ${Mn^2}^+$