IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 447 - 452 of 1042

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Question 447

Question

MCQ▾

ABC is a right angled triangle with . AH is drawn perpendicular to BC where H lies on BC. If AB = 40 cm and AC = 60 cm, then BH = ________.

Right-Angled Triangle ABC with AB = 40 Cm, AC = 60 Cm

Choices

Choice (4)Response

a.

40

b.

Impossible to determine

c.

30

d.

50

Question 448

Question

MCQ▾

What is the ratio of the perimeter of the shaded region to the circumference of the circle?

A Circle with Center a is Given

Choices

Choice (4)Response

a.

b.

c.

d.

Question 449

Question

MCQ▾

The radius of the cylinder whose lateral surface area is 610 and height 6 cm, is________.

Choices

Choice (4)Response

a.

16 cm

b.

11 cm

c.

10 cm

d.

12 cm

Question 450

Question

MCQ▾

The perimeter of a trapezoid is 60 cm and its non-parallel sides are each equal to 13 cm and its altitude is 12 cm. Its area is________.

Choices

Choice (4)Response

a.

b.

c.

d.

Question 451

Question

MCQ▾

The ratio of radii of two cylinders is 1: 3 and heights are in the ratio 3: 5. The ratio of their volume is________.

Choices

Choice (4)Response

a.

1: 14

b.

12: 3

c.

1: 12

d.

1: 15

Question 452

Question

MCQ▾

A metal sheet 49 cm long, 7 cm broad and 1 cm thick is melted into a cube. The difference between surface areas of two solids is________.

Choices

Choice (4)Response

a.

b.

c.

d.