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Total distance covered by the car in 12 hours = 55 x 12 = 660 km Time taken by the car in the return journey = 0.80 x 12 = 9.6 hours Average speed = Total distance covered ÷ Total time taken Average speed of the car = (660 x 2) ÷ (12 + 9.6) ~ 61.1 km/h
If 9x2 + 16y2 = 24xy, then find the ratio of ‘x’ and ‘y’, respectively.
If ab = -15 and (a2 + b2) = 34, then find the value of (a – b).
Find the value of ‘x’ in the given expression:
(49/16)x× (64/343)x-1= 4/7
If [8(x + y)3 – 27(x – y)3] ÷ (5y – x) = Ax2 + Bxy + Cy2, then the value of (A2 - 2B + 3C)...
If x/y = 5/3, Find (x+y)/(x-y)?
If (x + y + z) = 68, (x/z) = (3/4) and (z/y) = (2/5), then find the value of ‘y’.
A shopkeeper marked his article 25% above its cost price and offered a discount of 30%. If cost price of the article is Rs. 560, then find profit or los...
The coefficient of ‘b2’ in (3a + b)3 is