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The diameter of a sphere is 8 cm. It is melted and drawn into a wire of diameter 3 mm. Find the length of the wire -
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A train covers a distance of 12 km in 10 minutes. If it takes 6 seconds to pass a pole, then the length of the train is -
Speed = 12/10 × 60 = 72 kmph = 20 m/sec.
∴ Length of train = 20 × 6 = 120 m.
In this question two equations I and II are given. You have to solve both equations and choose the right option.
I. x2 – 5x – 84 = 0
II. y2 – 3y – 28 = 0
I. x2 – 4x + 3 = 0
II. y2 – 7y + 12 = 0
What approximate value should come in place of question mark in following question ?
12.50 × 14 ÷ 8.75 + 18 = 20 + ?
42.6 × 162.8 ÷ 642.8 × 22.8 = 4?
42.6 × 42 × 2.8 ÷ 43 × 2.8 × 41.4 = 4?
42.6 + 5.6 – 8.4 + 1.4 = 4?
? = 1.2
12.5% of 860 + 26% of 1240 = ?
65% of 380 + 18% of 420 = ?
? = 322
Cost of fencing a circular plot at the rate of 15 Rs./m is Rs. 3300. What will be the cost of flooring the plot at the rate of Rs. 100 per square metre ?
Circumference of plot = = 220 m
∴ 2πr = 220
r = 35 m.
∴ Area of floor = 22/7 × 35 × 35 = 3850 m2
So cost of flooring = 3850 × 100 = Rs. 385000
In how many different ways can the letters of the word "LADDER" be arranged ?
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