Question
Two towns D and E are 576 km apart. A bus starts from D at
5:15 a.m. at 64 km/h. Another bus starts from E at 6:45 a.m. towards D at 80 km/h. When will they meet?Solution
Time gap = 1.5 hrs → Distance = 64 × 1.5 = 96 km
Remaining = 576 – 96 = 480 km
Relative speed = 144 km/h
Time = 480 / 144 = 3.33 hours = 3h 20m
Meeting time = 6:45 a.m. + 3h 20m = 10:05 a.m.
- If (510 – 486 + 240) ÷ 8 + √2500 = x, then {(x/2) + 18} = ?
The speed of a car is 25% more than that of a bike. Both of them start from a same point. After travelling for 4 hours, the speed of the bike is increas...
If x² + y² + z² = xy + yz + zy (x≠0), then the value of (5x+3y-4z)/2x is
Solve: 1/x + 1/y = 5/2 and 1/x – 1/y = 1/6
Find the value of ‘x’ in the given expression:
(49/16)x × (64/343)x-1 = 4/7
If √y + (1/√y) = 10, then find the value of y + (1/y).
- If (x - y) = 2, then find the value of (x³ - y³ - 6xy).
If (a + b) = 9 and ab = 14, find the value of (a² + b²).
If n = 3 + √2, then find the value of (n + 1/n)².
If p = 24 - q - r and pq + r(q + p) = 132, then find the value of (p² + q² + r²).