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CBSE Class 10 Free Doubts and Solutions

If the roots of equation x3−12x2+39x−28=0 are in A.P, then common difference will be

Asked by rushabh123 18th February 2019, 11:05 AM

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Was I really full( change in to assertive)

Asked by Shivam 18th February 2019, 8:00 AM

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Find the readings of Ammeter and Voltmeter if the switch is turned on.

Asked by nilubablugupta 18th February 2019, 5:07 AM

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chapter-4 (shady plot) why helen appeared in parts.

Asked by sumansharma255883 17th February 2019, 9:03 PM

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2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before testing. Write the equation of the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid.

Asked by therockingarya 17th February 2019, 8:54 PM

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if the sides of a triangle are in AP and the greatest angle of the triangle is double the smallest angle the ratio of the sides of the triangle is

Asked by rushabh123 17th February 2019, 8:22 PM

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Two cars start together in the same direction from the same place. The first goes with uniform speed of 10km/hr. The second goes at a speed of 8km/hr in the first hour and increases its speed by 1/2 km/hr each succeeding hours. After how many hours will the second car overtake the first, if both cars go non stop?

Asked by rushabh123 17th February 2019, 8:20 PM

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In an A.P., if S6 + S7 = 167 and S10 = 235, then find the A.P., where Sn denotes the sum of its first n terms.

Asked by jaiacharya18 17th February 2019, 4:41 PM

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explain the role of tourism as a trade

Asked by krishna.vun 17th February 2019, 4:31 PM