Question
A bike covers a certain distance in 1.8 hours while
moving at a speed of 80 km/h. Later, due to traffic, the speed decreases and it takes 2 hours to cover the same route. What is the reduced speed of the bike?Solution
Distance = 80 × 1.8 = 144 km New speed = 144 ÷ 2 = 72 km/h
If a3 = 117 + b3 and a = 3 + b, then the value of a + b is:
The simple interest accrued on a sum at the rate of 10% p.a. for two years is Rs. 5,000.
Quantity I – What will be the compound interest on...
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If a + b2 + c2 = 16, x2 + y2 + z2 = 25 and ax + by + cz = 20, then the value of (a+b+c)/(x+y+z)