Maths-

General

Easy

Question

# In the given figure ABC is right angled at B in which BC = 15 cm, and CA = 17 cm Find the area of acute-angled triangle DBC, it being given that

- 60
- 10
- 65
- 50

## The correct answer is: 60

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### Two rods P and Q have equal lengths. Their thermal conductivities are K_{1} and K_{2 }and cross sectional areas are A_{1} and A_{2}. When the temperature at ends of each rod are T_{1} and T_{2} respectively, the rate of flow of heat through P and Q will be equal, if

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Hence option 1 is correct

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Hence option 1 is correct

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### A wedge of mass M fitted with a spring of stiffness 'k' is kept on a smooth horizontal surface. A rod of mass m is kept on the wedge as shown in the figure. System is in equilibrium. Assuming that all surfaces are smooth, the potential energy stored in the spring is:

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### The perimeter of a right triangle is 132 cm. and the sum of the squares of its sides is 6050 cm^{2}. What is the sum of the perpendicular sides –

Hence Choice 1 is correct

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Hence Choice 1 is correct

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For such questions, we should know the Pythagoras theorem of a triangle.

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For such questions, we should know the Pythagoras theorem of a triangle.

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Hence AF=(1/3)AC

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Hence Choice 1 is correct

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Hence Choice 1 is correct

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Hence choice 4 is correct

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Hence choice 4 is correct

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Hence choice 2 is correct

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Hence choice 2 is correct