A) 6 | B) 9 |

C) 24 | D) 30 |

Explanation:

Volume of block=(6x9x12) = 648

Side of largest cube = H.C.F of 6,9,12 = 3cm

Volume of the cube=(3x3x3)=27

Number of cubes=(648/27)=24

A) 100 π | B) 101/π |

C) 99 π/12 | D) 54/13π |

Explanation:

4/3 π x 10 x 10 x 10 = 8 x 4/3 π rxrxr

r = 5

4π x 5 x 5 = 100π

A) 6000 | B) 5400 |

C) 3800 | D) 4700 |

Explanation:

Let 'B' be the nuber of bricks.

=> 10 x 4/100 x 5 x 90/100 = 25/100 x 15/100 x 8/100 x B

=> 10 x 20 x 90 = 15 x 2 x B

=> B = 6000

A) 64 | B) 56 |

C) 48 | D) 40 |

Explanation:

Volume of cuboid = (24 x 9 x 8) cm = 1728 cu.cm

Volume of small cube = (3 x 3 x 3) cm = 27 cu.cm

So,

No. of small cubes formed = 1728/27 = 64.

A) 22/7 x 24/35 | B) 22/7 x 36 x 4 |

C) 22/7 x 36/5 | D) 22/7 x 37/21 |

Explanation:

Since level of water increased in cylinder by height 4.

This is because of the rectangular block .

Therefore , area of rectangular block immersed in water is = 22/7 x (6)^2 x 4

Thats why portion of block immersed in water is= (22/7 x 36 x 4) / total vol. of rectangle

= (22/7 x 36 x 4)/(7x5x6)

= 22/7 x 24/35.

A) 112 mts | B) 84 mts |

C) 96 mts | D) 108 mts |

Explanation:

Vol of silver = = 66 C.C

given D= 1mm => R = D/2 = 1/20 cm

=> = 66

= 66 x 400 x 7/22 = 8400 cm = 84 mtrs.