Hard Math Class 9 Level 1

A triangle has area 150 cm² and its base is 3 times its height. What is the height?

एक त्रिभुज का क्षेत्रफल 150 cm² है और आधार ऊंचाई का 3 गुना है। ऊंचाई क्या है?

A 5 cm / 5 cm B 10 cm / 10 cm C 15 cm / 15 cm D 20 cm / 20 cm
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Correct Answer

B. 10 cm / 10 cm

Explanation

If height is h then base is 3h. 150 = 1/2 × 3h² gives h² = 100 and h = 10 cm.

यदि ऊंचाई h है तो आधार 3h है। 150 = 1/2 × 3h² से h² = 100 और h = 10 cm।

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