**Q8.** The radius and height of a cylinder are in ratio 5 : 7 and its volume is 550 cm^{3}. Find its radius?

A. 5 cm |
B. 6 cm |

C. 4 cm |
D. 3 cm |

**Q9.** Into circular drum of radius 4.2 m and height 3.5 m, how many full bags of wheat can be emptied if the space required for wheat in each bag is 2.1 cubic meters?

A. 80 |
B. 85 |

C. 92 |
D. 90 |

**Q10.** The curved surface area of a cone is 4070 cm^{2} and its diameter is 70 cm. What is its slant height?

A. 35 cm |
B. 37 cm |

C. 48 cm |
D. 50 cm |

**Q11.** How many meters of cloth 5 m wide will be required to make a conical tent, the radius of whose base is 7 m and whose height is 74 m?

A. 100 m |
B. 120 m |

C. 150 m |
D. 110 m |