A) 6 | B) 8 |

C) 12 | D) 16 |

Explanation:

Side of smallest cube = L.C.M of 5,10,20 = 20cm

Volume of the cube = (20x20x20) = 8000

Volume of the block= (5x10x20) = 1000

Number of blocks = (8000/1000) = 8

A) 14.69 cm | B) 29.39 cm |

C) 18.65 cm | D) 22.21 cm |

Explanation:

Volume of water flowing through 1 pipe of diameter x = Volume discharged by 6 pipes of dia 12 cms

As speed is same, area of cross sections should be same.

Area of bigger pipe of diameter x = Total area of 6 smaller pipes of diameter 12

i.e

Here R = R and R1 = 12/2 = 6

R = 14.696

=> D = X = 14.696 x 2 = 29.3938 cm.

A) 175 | B) 345 |

C) 265 | D) 300 |

Explanation:

Number of books that can be placed in the larger box is given by Volume of Box / Volume of book.

Now, n = 25 x 42 x 60 / 7 x 6 x 5

= 63000 / 210

= 300.

300 books can be in that box.

A) 9216 | B) 10246 |

C) 12345 | D) 7527 |

Explanation:

It takes four of those little squares -- each one 1/2 inch on a side -- to cover one square inch. That's because each one is 1/2 x 1/2, or 1/4 of a square inch.

In a rectangle that is 48 inches by 48 inches, there are 2304 square inches.(1 ft = 12 inches)

Since it takes 4 little squares to cover 1 sq inch, then it would need 2304 x 4 squares (1/2 inch on a side each) to cover a rectangle 4 feet by 4 feet.

That is 9,216 of those squares.

A) 2500 | B) 25000 |

C) 12500 | D) 15400 |

Explanation:

We know that,

One square meter is equal to 10,00,000 sq mm.

Given, each mesh is 8mm length and 5mm wide

Therefore for each mesh : 8 x 5 = 40 sq mm.

So, number of meshes= = 25000.

A) 500 | B) 600 |

C) 400 | D) 300 |

Explanation:

Given length of iron rod =7 mts

and diameter of rod = 2 cms

Volume of one rod = cu. m = cu. m

Given volume of iron = 0.88 cu. m

Number of rods = = 400.