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Tarun Gupta

Let PQR be a triangle in which PQ=3. From the vertex R, draw the altitude RS to meet PQ at S. Assume that RS=√3 and PS=QR. Then PR equals -
Raj Singh

Hope this will help you to clear your doubt
Tarun Gupta

Thanks, Raj Singh

NazIa Farheen

A specially designed vernier calliper has the main scale least count of 1 mm. On the vernier scale, there are 10 equal divisions and they match with 11 main scale divisions. Then, the least count of the vernier calliper is -
Astha Verma

Least count = 1 V.S.D. – 1 M.S.D.
Where V.S. D = Vernier scale division
M.S.D = Main scale division
Main scale division = 11
Vernier scale division = 10
Least count = 1 mm
So, the least count will be
Least count = [MSD / VSD] – 1
(L.C.) = [11 / 10] − 1 = [11 – 10] / 10 = 1 / 10 = 0.1mm
OR
Alternate solution
L.C. = (main scale least count)/(no. of the division of V.S.D which coincide with M.S.D.)
∴ L.C. = 1 / 10
∴ L.C. = 0.1 mm

Hope this will help you to clear your doubt
NazIa Farheen

Okay, Got it
Thanks, Astha

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