Question

Answer these all questions properly with steps if you know otherwise don't . Don't Spam .....⚠️​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

here, Q.1) we know that 1dm = 10cm

so, 12cm = 1.2dm

area of rectangle = 1.2dm × 2.5dm

                             = 3dm²

Q.2) we know that 1 decameter = 1000 centimeter

so, 1 square decameter = 1000 centimeter × 1000 centimeter

                                       = 1000000 cm²

Q.3) we know that Are is a unit to measure area

so, 1are = 100000000 mm²

Q.4) Area of square A = $x * x$

                                     = $x^{2}$

now, Area of square B = $\frac{4}{5}x * \frac{4}{5}x$

                                      = $\frac{16}{25}x^{2}$

reduced area = $x^{2}$ - $\frac{16}{25}x^{2}$

                       = $\frac{9}{25}x^{2}$

Percentage of reduced area = $\frac{\frac{9}{25}x^{2}}{x^{2}} * 100$

                                                = 36%

Q.5) here, by pythagoras theorem, we have,

(AO)² = (AB)² - (BO)²

(AO)² = 65² - 63²

AO = √256

AO = 16 cm

d1 = 63 + 63 = 126 cm

d2 = 16 + 16 = 32 cm

now, Area of rhombus = 1/2 × d1 × d2

                                     = 1/2 × 126 cm × 32 cm

                                     = 126 cm × 16 cm

                                     = 2016 cm²

Q.6) By pythagoras theorem

(z)² = (x)² + (y)²

z = $\sqrt{x^{2} + y^{2}}$

Q.7) The length of diagonal (diameters) of rhombus is 70 cm and 24 cm

now, by pythagoras theorem, we have,

side = √35² + 12²

       = √1369

       = 37 cm

so, Perimeter of rhombus = 4 × side

                                           = 4 × 37 cm

                                           = 148 cm

Q.8) Area of equilateral triangle = $\frac{\sqrt{3}}{4} * side^{2}$

Q.9) volume of cube = side³

                  2744cm³ = side³

                          side = ∛2744cm³

                          side = 14cm

now, surface area of cube = 6 × side²

                                            = 6 × 14²

                                            = 1176 cm²

Q.10) Surface area of cube = 6 × side²

                            1734 cm² = 6 × side²

                                   side² = 1734 cm²/6

                                    side = √289 cm²

                                    side = 17 cm

now, Volume of cube = side³

                                    = (17 cm)³

                                    = 4913 cm³

hope it will help you.