Isra can row ^@15 \space km^@ downstream in ^@3 \space hours^@, and ^@9 \space km^@ upstream in ^@3 \space hours^@. The pair of equations, which correctly represents the word problem stated as above is
Phailin goes on a vacation with ฿1440 for her expenses. If she extends her vacation by 4 days, she has to cut down her daily expenses by ฿4. Find the original duration of her vacation.
In the adjoining figure, ^@ S ^@ and ^@ T ^@ are points on the sides ^@PQ ^@ and ^@ PR ^@ respectively of ^@ \Delta PQR ^@ such that ^@ PT = 3 \space cm^@, ^@TR = 9 \space cm^@ and ^@ ST ^@ is parallel to ^@ QR ^@. Find the ratio of the areas of ^@ \Delta PST ^@ and ^@ \Delta PQR ^@.
In the given figure, ^@ PQ ^@ is a chord of a circle with centre ^@ O ^@ and ^@ PT ^@ is a tangent at point ^@ P ^@. If ^@\angle QPT ^@ = ^@ 41^\circ ^@, find ^@ \angle PRQ ^@.
To warn ships for underwater rocks, a lighthouse throws a red colored light over a sector of angle ^@ 150^\circ ^@ to a distance of ^@ 2.1 \space km^@. Find the area of the sea over which the ships are warned. ^@ \bigg( ^@ Use ^@ \pi = \dfrac { 22 } { 7 } \bigg)^@
Thurian made a bird-bath for his garden in the shape of a cylinder with a hemispherical depression at one end. If the height of the cylinder is 150 cm and its radius is 91 cm. Choose the correct total surface area of the bird-bath. (Take π = 22/7)
There are 3 hats belonging to 3 students. The hats were put into a box, and each student pulls out a hat one after the other. What is the probability that each student gets his or her own hat?
Solve for ^@x^@ and ^@y^@ by using the elimination method.
@^\begin{aligned}
& \dfrac { c x } { d } - \dfrac { d y } { c } = c + d \\
& c x - d y = 2 c d
\end{aligned}@^
Faces of a cube are marked with A,B,C,D,E and F. Two views of the cube are as shown below, if face B is opposite to face D, what will be there on the face opposite to face F?
Six friends A, B, C, D, E and F are sitting in a circle facing the center. B is not between E and F but some other one. C is next to the left of A. D is 4th to right of C. Which of the following statements is not true?